CodeGen from PR 15197 in Azure/azure-rest-api-specs

[Hub Generated] Review request for Microsoft.RecoveryServices to add version stable/2021-06-01 (#15197)

* Adds base for updating Microsoft.RecoveryServices from version stable/2021-04-01 to version 2021-06-01

* Updates readme

* Updates API version in new specs and examples

Author: SDKAuto