sanitize configuration keys correctly (#3143)

* sanitize configuration keys correctly

The api template uses class_name, but the config was not. This led to
a divergence for On-Call Paging:

Usage: https://github.com/DataDog/datadog-api-client-go/blob/31a2b1a4757da7b06ba985bba77b512c5f45224d/api/datadogV2/api_on_call_paging.go#L89
Configuration: https://github.com/DataDog/datadog-api-client-go/blob/31a2b1a4757da7b06ba985bba77b512c5f45224d/api/datadog/configuration.go#L324

* use tags

---------

Co-authored-by: Sherzod Karimov <sherzod.karimov@datadoghq.com>

Author: bndbsh

.generator/src/generator/templates/configuration.j2

@@ -154,7 +154,7 @@ func NewConfiguration() *Configuration {
 			{%- for operation in path.values() %}
 			{%- for server in operation.servers %}
 			{%- if loop.first %}
-			"{{ version }}.{{ operation.tags[0].replace(" ", "") }}Api.{{ operation.operationId }}": {
+			"{{ version }}.{{ operation.tags[0] | class_name }}.{{ operation.operationId }}": {
 			{%- endif %}
 				{{ server_configuration(server)|indent("\t"*4) }},
 			{%- if loop.last %}

api/datadog/configuration.go

@@ -321,7 +321,7 @@ func NewConfiguration() *Configuration {
 					},
 				},
 			},
-			"v2.On-CallPagingApi.CreateOnCallPage": {
+			"v2.OnCallPagingApi.CreateOnCallPage": {
 				{
 					URL:         "https://{site}",
 					Description: "No description provided",
@@ -368,7 +368,7 @@ func NewConfiguration() *Configuration {
 					},
 				},
 			},
-			"v2.On-CallPagingApi.AcknowledgeOnCallPage": {
+			"v2.OnCallPagingApi.AcknowledgeOnCallPage": {
 				{
 					URL:         "https://{site}",
 					Description: "No description provided",
@@ -415,7 +415,7 @@ func NewConfiguration() *Configuration {
 					},
 				},
 			},
-			"v2.On-CallPagingApi.EscalateOnCallPage": {
+			"v2.OnCallPagingApi.EscalateOnCallPage": {
 				{
 					URL:         "https://{site}",
 					Description: "No description provided",
@@ -462,7 +462,7 @@ func NewConfiguration() *Configuration {
 					},
 				},
 			},
-			"v2.On-CallPagingApi.ResolveOnCallPage": {
+			"v2.OnCallPagingApi.ResolveOnCallPage": {
 				{
 					URL:         "https://{site}",
 					Description: "No description provided",