Add support of Azure asset IDs for the vector store.

[nick863]

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fix https://github.com/Azure/azure-rest-api-specs/issues/31349

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Generated ApiView

Language	Package Name	ApiView Link
Python	azure-ai-projects	https://apiview.dev/Assemblies/Review/a8bd55fd470240e29e7648d13a7882eb?revisionId=da20f9d88b6b40f8b31c477094124f68
TypeSpec	Azure.AI.Projects	https://apiview.dev/Assemblies/Review/2d95fc27d5b8484a8600b3f00af0901f?revisionId=c094cd6a16ad480c93eba401095e2f74

[jhakulin]

The title of PR says use Azure asset IDs instead of file IDs. The change is additional, so both can be used, right?