feat: a new field base64_encoded_name is added to the Product message (#33819)

* feat: a new field `base64_encoded_name` is added to the `Product` message
feat: new fields - `base64_encoded_name` and `base64_encoded_product` added to the `ProductInput` message
docs: A comment for field `name` in message `.google.shopping.merchant.products.v1.ProductInput` is changed
docs: A comment for field `name` in message `.google.shopping.merchant.products.v1.Product` is changed

PiperOrigin-RevId: 896968813

Source-Link: googleapis/googleapis@2aba484

Source-Link: googleapis/googleapis-gen@820077f
Copy-Tag: eyJwIjoiZ29vZ2xlLXNob3BwaW5nLW1lcmNoYW50LXByb2R1Y3RzLXYxLy5Pd2xCb3QueWFtbCIsImgiOiI4MjAwNzdmOGY5ZDdkZGUwZGEyYzA3MTk3MjA2OGVlOWM1NzQyMWE4In0=

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

---------

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: gcf-owl-bot[bot]

google-shopping-merchant-products-v1/lib/google/shopping/merchant/products/v1/product_inputs_service/client.rb

@@ -457,10 +457,10 @@ def update_product_input request, options = nil
               #         MUST be used if any part of the product identifier (like `offer_id`)
               #         contains characters such as `/`, `%`, or `~`.
               #         *   Example: To represent the product ID `en~US~sku/123`, the
-              #             `{productInput}` segment must be the base64url encoding of this
-              #             string, which is `ZW5-VVMtc2t1LzEyMw`. The full resource name
+              #             `{productInput}` segment must be the unpadded base64url encoding of
+              #             this string, which is `ZW5-VVN-c2t1LzEyMw`. The full resource name
               #             for the product would be
-              #             `accounts/123/productInputs/ZW5-VVMtc2t1LzEyMw`.
+              #             `accounts/123/productInputs/ZW5-VVN-c2t1LzEyMw`.
               #
               #     2.  **Plain Format**: The `{productInput}` segment is the tilde-separated
               #     string
@@ -472,10 +472,6 @@ def update_product_input request, options = nil
               #     correct parsing, especially those containing special characters. The
               #     presence of tilde (`~`) characters in the `{productInput}` segment is used
               #     to differentiate between the two formats.
-              #
-              #     Note: For calls to the v1beta version, the plain format is
-              #         `channel~content_language~feed_label~offer_id`, for example:
-              #         `accounts/123/productinputs/online~en~US~sku123`.
               #   @param data_source [::String]
               #     Required. The primary or supplemental data source from which the product
               #     input should be deleted. Format:

google-shopping-merchant-products-v1/lib/google/shopping/merchant/products/v1/product_inputs_service/rest/client.rb

@@ -436,10 +436,10 @@ def update_product_input request, options = nil
                 #         MUST be used if any part of the product identifier (like `offer_id`)
                 #         contains characters such as `/`, `%`, or `~`.
                 #         *   Example: To represent the product ID `en~US~sku/123`, the
-                #             `{productInput}` segment must be the base64url encoding of this
-                #             string, which is `ZW5-VVMtc2t1LzEyMw`. The full resource name
+                #             `{productInput}` segment must be the unpadded base64url encoding of
+                #             this string, which is `ZW5-VVN-c2t1LzEyMw`. The full resource name
                 #             for the product would be
-                #             `accounts/123/productInputs/ZW5-VVMtc2t1LzEyMw`.
+                #             `accounts/123/productInputs/ZW5-VVN-c2t1LzEyMw`.
                 #
                 #     2.  **Plain Format**: The `{productInput}` segment is the tilde-separated
                 #     string
@@ -451,10 +451,6 @@ def update_product_input request, options = nil
                 #     correct parsing, especially those containing special characters. The
                 #     presence of tilde (`~`) characters in the `{productInput}` segment is used
                 #     to differentiate between the two formats.
-                #
-                #     Note: For calls to the v1beta version, the plain format is
-                #         `channel~content_language~feed_label~offer_id`, for example:
-                #         `accounts/123/productinputs/online~en~US~sku123`.
                 #   @param data_source [::String]
                 #     Required. The primary or supplemental data source from which the product
                 #     input should be deleted. Format:

google-shopping-merchant-products-v1/lib/google/shopping/merchant/products/v1/productinputs_pb.rb

@@ -229,10 +229,10 @@ def logger
               #         MUST be used if any part of the product identifier (like `offer_id`)
               #         contains characters such as `/`, `%`, or `~`.
               #         *   Example: To represent the product ID `en~US~sku/123`, the
-              #             `{product}` segment must be the base64url encoding of this
-              #             string, which is `ZW5-VVMtc2t1LzEyMw`. The full resource name
+              #             `{product}` segment must be the unpadded base64url encoding of this
+              #             string, which is `ZW5-VVN-c2t1LzEyMw`. The full resource name
               #             for the product would be
-              #             `accounts/123/products/ZW5-VVMtc2t1LzEyMw`.
+              #             `accounts/123/products/ZW5-VVN-c2t1LzEyMw`.
               #
               #     2.  **Plain Format**: The `{product}` segment is the tilde-separated string
               #         `content_language~feed_label~offer_id`. This format is suitable only

google-shopping-merchant-products-v1/lib/google/shopping/merchant/products/v1/products_common_pb.rb

@@ -222,10 +222,10 @@ def logger
                 #         MUST be used if any part of the product identifier (like `offer_id`)
                 #         contains characters such as `/`, `%`, or `~`.
                 #         *   Example: To represent the product ID `en~US~sku/123`, the
-                #             `{product}` segment must be the base64url encoding of this
-                #             string, which is `ZW5-VVMtc2t1LzEyMw`. The full resource name
+                #             `{product}` segment must be the unpadded base64url encoding of this
+                #             string, which is `ZW5-VVN-c2t1LzEyMw`. The full resource name
                 #             for the product would be
-                #             `accounts/123/products/ZW5-VVMtc2t1LzEyMw`.
+                #             `accounts/123/products/ZW5-VVN-c2t1LzEyMw`.
                 #
                 #     2.  **Plain Format**: The `{product}` segment is the tilde-separated string
                 #         `content_language~feed_label~offer_id`. This format is suitable only