chore(main): release 2.57.0 (#3779)

🤖 I have created a release *beep* *boop*
---


<details><summary>2.57.0</summary>

##
[2.57.0](v2.56.3...v2.57.0)
(2025-05-05)


### Features

* Generate IAM v3beta Client Library
([#3780](#3780))
([6fc9656](6fc9656))


### Bug Fixes

* Update IAM v3 groupId to the correct value
([#3777](#3777))
([6ecbf5f](6ecbf5f))
</details>

---
This PR was generated with [Release
Please](https://github.com/googleapis/release-please). See
[documentation](https://github.com/googleapis/release-please#release-please).

---------

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>
Co-authored-by: cloud-java-bot <cloud-java-bot@google.com>
Co-authored-by: Lawrence Qiu <lawrenceqiu@google.com>

Author: 3 people

gapic-generator-java-bom/pom.xml

@@ -127,12 +127,7 @@
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-iam-v3</artifactId>
-        <version>1.50.4-SNAPSHOT</version><!-- {x-version-update:proto-google-iam-v3:current} -->
-      </dependency>
-      <dependency>
-        <groupId>com.google.api.grpc</groupId>
-        <artifactId>proto-google-iam-v3beta</artifactId>
-        <version>1.50.4-SNAPSHOT</version><!-- {x-version-update:proto-google-iam-v3beta:current} -->
+        <version>1.51.0</version><!-- {x-version-update:proto-google-iam-v3:current} -->
       </dependency>
 
       <!-- Following test deps are kept to keep them consistent with versions above -->
@@ -164,12 +159,7 @@
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-iam-v3</artifactId>
-        <version>1.50.4-SNAPSHOT</version><!-- {x-version-update:grpc-google-iam-v3:current} -->
-      </dependency>
-      <dependency>
-        <groupId>com.google.api.grpc</groupId>
-        <artifactId>grpc-google-iam-v3beta</artifactId>
-        <version>1.50.4-SNAPSHOT</version><!-- {x-version-update:grpc-google-iam-v3beta:current} -->
+        <version>1.51.0</version><!-- {x-version-update:grpc-google-iam-v3:current} -->
       </dependency>
     </dependencies>
 

java-iam/pom.xml

@@ -145,12 +145,12 @@
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>proto-google-iam-v3</artifactId>
-        <version>1.50.4-SNAPSHOT</version><!-- {x-version-update:proto-google-iam-v3:current} -->
+        <version>1.51.0</version><!-- {x-version-update:proto-google-iam-v3:current} -->
       </dependency>
       <dependency>
         <groupId>com.google.api.grpc</groupId>
         <artifactId>grpc-google-iam-v3</artifactId>
-        <version>1.50.4-SNAPSHOT</version><!-- {x-version-update:grpc-google-iam-v3:current} -->
+        <version>1.51.0</version><!-- {x-version-update:grpc-google-iam-v3:current} -->
       </dependency>
       <dependency>
         <groupId>javax.annotation</groupId>