[ReleasePR digitaltwins] [Hub Generated] Public private branch 'dev-digitaltwins-Microsoft.DigitalTwins-2021-06-30-preview-merge-with-main' (#2188)

Create to sync Azure/azure-rest-api-specs#17186
[ReCreate this PR](https://github.com/azure-resource-manager-schemas/compare/main...AzureSDKAutomation:sdkAuto/digitaltwins?expand=1)

Author: msftbot[bot]