model transparency benchmarks running on every issue comment and having auth issues.

[spencerschrock]

Description

Despite having an expression to gate the benchmarks behind comments with /bench, it appears to have been publishing GHCR images since it was merged.

[spencerschrock]

Additionally, we're having issues authing to GCP:

Unable to acquire impersonated credentials', '{\n "error": {\n "code": 403,\n "message": "Permission 'iam.serviceAccounts.getAccessToken' denied on resource (or it may not exist)."

[spencerschrock]

Test comment for checking bench workflow trigger