Library-generation fails on release PRs

[meltsufin]

+ docker run --rm -u 1001:1001 -v /home/runner/work/google-cloud-java/google-cloud-java:/workspace -v /tmp/tmp.YRQLyh2Yi8:/workspace/googleapis -e GENERATOR_VERSION=2.71.0 gcr.io/cloud-devrel-public-resources/java-library-generation:2.71.0 --generation-config-path=/workspace/generation_config.yaml --library-names= --api-definitions-path=/workspace/googleapis
Unable to find image 'gcr.io/cloud-devrel-public-resources/java-library-generation:2.71.0' locally
docker: Error response from daemon: manifest for gcr.io/cloud-devrel-public-resources/java-library-generation:2.71.0 not found: manifest unknown: Failed to fetch "2.71.0"

[blakeli0]

Root pom generation and gapic-bom generation also failed for the same reason