Fix plugin classpath for linters

[sync-by-unito]

See #14 (comment)

For some reason, applying the linter plugin changes how the classpath is evaluated. I can see a lot of discussions around how Gradle handles plugin classpath, so I suspect the root cause is hidden somewhere there. But it would be nice if the linters didn't specified the version of the gradle plugin. It is a weird place to do it.

Maybe something we can fix as part of  https://jira.mongodb.org/browse/RKOTLIN-25