[K2] Replace `JavaToKotlinClassMap` with stable one

[vmishenev]

JavaToKotlinClassMap is from the compiler artifact. After removing the compiler from dependencies in Dokka K2, JavaToKotlinClassMap can be unavailable. We can use it from reflection, but kotlin.reflect.jvm.internal.impl.builtins.jvm.JavaToKotlinClassMap is internal and is not stable. It needs to find a substitution of JavaToKotlinClassMap.

Possible solutions

• Research KtJvmTypeMapperMixIn from Analysis API. Can Dokka use it?
• Ask the Analysis API team to add it.

[IgnatBeresnev]

It's unclear whether it should be part of analysis API, but at the very least we can use the publicly exposed JavaToKotlinClassMap from kotlin.reflect.

Needs more research, not a blocker for the release.

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Is it blocking?

• Testing: no
• Beta: no
• Release: nice to have