Metadata: Throw error for shared type in inheritance

[smitpatel]

Resolves #21570

[ghost]

Hello @smitpatel!

Because this pull request has the auto-merge label, I will be glad to assist with helping to merge this pull request once all check-in policies pass.

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[smitpatel]

@msftbot require 1 approval

[ghost]

Hello @smitpatel!

Because you've given me some instructions on how to help merge this pull request, I'll be modifying my merge approach. Here's how I understand your requirements for merging this pull request:

• I'll only merge this pull request if it has at least 1 approval

If this doesn't seem right to you, you can tell me to cancel these instructions and use the auto-merge policy that has been configured for this repository. Try telling me "forget everything I just told you".