[ReleasePR recoveryservicessiterecovery] Introducing new API version 2021-12-01 for Azure Site Recovery service (#2182)

Create to sync Azure/azure-rest-api-specs#17333
[ReCreate this PR](https://github.com/azure-resource-manager-schemas/compare/main...AzureSDKAutomation:sdkAuto/recoveryservicessiterecovery?expand=1)

Author: msftbot[bot]