CodeGen from PR 15411 in Azure/azure-rest-api-specs

[Hub Generated] Review request for Render to add version preview/2.1 (Azure#15411)

* render updates based on Azure/azure-rest-api-specs#14625

* GetAttribution response codes

* remove common error responses

* go multiapi batch should include 2.0

* fix openapi 3.0 definition of file response, keep content-type

* keep operationId between 2.0 and 2.1

* update samples and header response

* exclude 2.0 from 2.1-preview tag, refs in 2.1 params, remove used Text param

* refrain from changing 2.0 timestamp format

* remove default in tileSize

* remove redundant required: false

* bump python package version

* make sure there is no cross-client parameter references - move all shared into Common

* remove non-supported application/xml MIME

* use local apiversion param def