CodeGen from PR 23650 in Azure/azure-rest-api-specs

Updating response objects of Provider level APIs (Pure Proxy RTs) (#23650)

* Updating UserApiKeyResponse and ElasticVersionsListResponse for properties

* Updating UserApiKeyResponse

* Updating ElasticVersionsListResponse

* Fixing PrettierCheck

* Fixing PrettierCheck from ElasticVersionsListResponseProperties

* Adding x-ms-pageable in elasticVersions

* Adding nextLink in ElasticVersionsListResponse

* Removing nextLink from ElasticVersionsListResponseProperties

* updated response for elasticVersions API

* prettier fix

* prettier fix elasticversions_list

* Added description to ElasticVersionsListResponse

* added description to all objects

---------

Co-authored-by: Rhea Hooda <rheahooda@microsoft.com>