[ReleasePR resourcemover] [DO NOT MERGE]Dev resourcemover microsoft.migrate 2021 08 01 (#2099)

Create to sync Azure/azure-rest-api-specs#15496
[ReCreate this PR](https://github.com/azure-resource-manager-schemas/compare/main...AzureSDKAutomation:sdkAuto/resourcemover?expand=1)

Author: msftbot[bot]