upgrade media API version from 2020-05-01 and 2021-05-01 to 2021-11-01 and 2022-08-01

[teowa]

Notes:

• support User Assigned Identity for azurerm_media_services_account
• upgradation for azurerm_media_streaming_endpoint is blocked due to media: fixing the Swagger Tag for consistency Azure/azure-rest-api-specs#21581

Test:

TF_ACC=1 go test -v ./internal/services/media -test.run=TestAccMediaServicesAccount_identity -timeout 1440m -ldflags="-X=github.com/hashicorp/terraform-provider-azurerm/version.ProviderVersion=acc"
=== RUN   TestAccMediaServicesAccount_identity
=== PAUSE TestAccMediaServicesAccount_identity
=== CONT  TestAccMediaServicesAccount_identity
--- PASS: TestAccMediaServicesAccount_identity (441.22s)
PASS
ok      github.com/hashicorp/terraform-provider-azurerm/internal/services/media 442.385s

[katbyte]

we have test failures:

[katbyte]

LGTM 📺

[teowa]

[github-actions]

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