Make MI property optional for LZR

[sid2305]

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[openapi-pipeline-app]

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[openapi-pipeline-app]

Generated ApiView

Language	Package Name	ApiView Link
Go	sdk/resourcemanager/sovereign/armsovereign	https://apiview.dev/Assemblies/Review/dad504b43bca472f9dded9bd7916ea1e?revisionId=e7d0150177f54306bafac591b5121f87
Java	azure-resourcemanager-sovereign	https://apiview.dev/Assemblies/Review/374bc212ffdb44f58d3230dbfc55663c?revisionId=98a657586d0046fcbb7377e477b2c090
JavaScript	@azure/arm-sovereign	https://apiview.dev/Assemblies/Review/bd58d62cb4bd4df5801c2ea22bf3393e?revisionId=ea93d266ee8e4b058bad598ebe32b26f

[azure-sdk]

API change check

APIView has identified API level changes in this PR and created following API reviews.

Microsoft.Sovereign
Microsoft.Sovereign