enable configuration cache

[martinbonnin]

Blocked on https://youtrack.jetbrains.com/issue/KT-55051/MetadataDependencyTransformationTask-is-not-compatible-with-Gradle-configuration-cache

[BoD]

Done in #5083

[BoD]

Actually there are still a few issues left that prompted us to disable it for now:

• Consider supporting Gradle's configuration cache Kotlin/dokka#1217
• https://youtrack.jetbrains.com/issue/KT-60311/

See also gradle/gradle#20673.

See #5089

[BoD]

Done again in #5530

[dsvensson]

Seems to be a bit more to do here looking forward. Enabling upcoming configuration cache related project isolation via org.gradle.unsafe.isolated-projects=true fails on apollo gradle plugin. Perhaps should be a new issue.

More details, https://docs.gradle.org/nightly/userguide/isolated_projects.html

[martinbonnin]

@dsvensson project isolation compatibility is tracked there. Can you add the details of the error (stacktrace, build report) there?