Spotless Gradle plugin breaks the clean task when Gradle's configuration cache is enabled

[eskatos]

Using the project at execution time is not allowed when Gradle's configuration cache is enabled.

The spotless plugin registers a doLast task action on the clean task that accesses the project at execution time. The effect
of this is to break using the clean task on all builds that have the spotless plugin applied when Gradle's configuration cache is enabled.

Also see #644 which is about having full support of Gradle's configuration cache in the Spotless plugin. This issue is only about not preventing to use the clean tasks on builds that have the Spotless plugin applied.

[nedtwigg]

Thanks for the issue and PR! Fixed in 5.10.1.

[eskatos]

Thank you for the quick turnaround!