Merge pull request gradle#11204 from gradle/eskatos/smoke-test/genera…

…ted-api-jars

Let smoke tests segregate the partial distro generated api jars

Avoid Guava when printing failure messages in messaging

Attempt to capture failure during worker process shutdown

Handle serialization for shadowed capabilities in the GMM case (gradl…

…e#11179)

This is now done in the same way as it is done in the
AbstractRealisedModuleResolveMetadataSerializationHelper
for cases without GMM

Follow up to: gradle#11118

Make Zinc version constant public

And use it in Javadoc

Limit 5.x compatibility in tests to JDK12 or older

Merge pull request gradle#10435 from gradle/zchase/docs-build-cache-t…

…raining-promotion

Add build cache training promotion link to selected docs

Fix resolving `DirectoryTee` elements of a `FileCollection`.

Polish release notes

Update to latest 5.6 nightly