kokoro/run: fallback from PR # to commit in service name #1409
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Problem
Cloud Run release testing does not rely on a PR. The
.kokoro/build-with-run.shscript names a service with a hard dependency on a PR-specific environment variable. As a result, end-to-end tests attempt to deploy with an invalid name (e.g.,sample-name-).Solution
This PR adjusts the construction of the service name to fall back to the first 12 characters of the commit hash of the change if the PR environment variable is not available.