Wait for image ingestion step failing due to having multiple user assigned identities

[lbussell]

- ManagedIdentityCredential authentication unavailable. The requested identity has not been assigned to this resource.
Status: 400 (Bad Request)

Content:
{"error":"invalid_request","error_description":"Multiple user assigned identities exist, please specify the clientId / resourceId of the identity in the token request"}

We don't control which identities are attached to the VMs we get. We should consider using an identity with no special permissions to access this API.

[dotnet-issue-labeler[bot]]

I couldn't figure out the best area label to add to this issue. If you have write-permissions please help me learn by adding exactly one area label.

[lbussell]

I have created a new identity and service connection, and am working out how to use it to work around this issue.