Regenerate azure-storage-file-share API snapshot for consistency check

[Copilot]

The consistency GitHub Actions job was failing because the committed API snapshot for azure-storage-file-share no longer matched the public surface produced by azpysdk apistub. This updates the checked-in snapshot and metadata to match the current generated surface.

• API snapshot alignment

  • Regenerated sdk/storage/azure-storage-file-share/api.md
  • Removed the stale SignedIdentifier entry that was still present in the committed snapshot but is not emitted in the current public API surface

• Metadata refresh

  • Updated sdk/storage/azure-storage-file-share/api.metadata.yml
  • Refreshed apiMdSha256 to match the regenerated api.md

• Result

  • Brings the checked-in api.md/api.metadata.yml pair back in sync with the consistency gate’s generated output

# Removed from the committed api.md snapshot
class azure.storage.fileshare.SignedIdentifier(DictMixin):
    access_policy: Optional[AccessPolicy]
    id: str