[epic] issues found when adding spector test cases for clientInitialization

[kazrael2119]

add some initializedBy cases in https://github.com/Azure/typespec-azure/tree/main/packages/azure-http-specs/specs/azure/client-generator-core/client-initialization

[qiaozha]

The effort will be done in typespec-azure repo, this issue is mainly to track the progress of this item.