[PR] CI/Caching: Fix Gradle cache retention [polaris]

["snazy (via GitHub)" <gi...@apache.org>]

snazy opened a new pull request, #2604:
URL: https://github.com/apache/polaris/pull/2604

   Older versions of Gradle's setup-gradle action did not actively trigger stale cache entry cleanup, which is why there was a separate step "Trigger Gradle home cleanup" in `gradle.yml`. Nowadays, that action triggers a "noop build" to explicitly trigger stale cache entry cleanup, but uses somewhat different defaults than [described here](https://docs.gradle.org/current/userguide/directory_layout.html#dir:gradle_user_home:configure_cache_cleanup).
   
   This change adds an explicit configuration for Gradle cache cleanup/retention with reasonable values considering the total 10GB limit for all GitHub caches per repository.
   
   The change described above lead to a behavioral change, which evicts all non-accessed cache entries within the current GH workflow job, which effectively evicted all cache entries from dependent jobs - in other words: the (build) cache was nearly empty, leading to full rebuilds. This behavior could be observed in the output of the "Post Collect partial Gradle build caches"-step in the log message "Build cache (/home/runner/.gradle/caches/build-cache-1) removing files not accessed on or after ..." showing the timestamp when the setup-gradle action was started.
   


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Re: [PR] CI/Caching: Fix Gradle cache retention [polaris]

["snazy (via GitHub)" <gi...@apache.org>]

snazy merged PR #2604:
URL: https://github.com/apache/polaris/pull/2604


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