[ReleasePR synapse] Users/v sparatala/merge allx ms mutability (#2599)
[ReleasePR synapse] Users/v sparatala/merge allx ms mutability (#2599)

Create to sync https://github.com/Azure/azure-rest-api-specs/pull/20749
[ReCreate this PR](https://github.com/azure-resource-manager-schemas/compare/main...azure-sdk:sdkAuto/synapse?expand=1)
Azure/azure-resource-manager-schemas,Azure/azure-resource-manager-schemas,Azure/azure-resource-manager-schemas,Azure/azure-resource-manager-schemas