feat(hermetic-build): allow custom api definitions dir in generation action#3788

diegomarquezp wants to merge 5 commits intomaingoogleapis/sdk-platform-java:mainfrom

hermetic-library-generation-with-custom-api-def-dirgoogleapis/sdk-platform-java:hermetic-library-generation-with-custom-api-def-dirCopy head branch name to clipboard