CodeGen from PR 17154 in Azure/azure-rest-api-specs

[Hub Generated] Public private branch 'dev-recoveryservices-Microsoft.RecoveryServices-2021-11-01-preview' (#17154)

* Adds base for updating Microsoft.RecoveryServices from version stable/2021-08-01 to version 2021-11-01-preview

* Updates readme

* Updates API version in new specs and examples

* Adding backupStorageVersion to vault properties

Author: SDKAuto