Port caching and resource management for macro/plugin classloaders, classpath JARs from scalac

[smarter]

See scala/scala#6314 and scala/scala#7366

[crt-31]

bump.

This is needed for Bazel's rules_scala to properly support Scala3. (see bazel-contrib/rules_scala#1545). Probably needed my many other tools too.

(Quick look: I see some issues where JarArchive isn't being closed, so it likely has dangling nio filesystem object).