Added special check for function types in debug mode

[Jolanrensen]

Fixes failing test in debug mode:

org.jetbrains.kotlinx.dataframe.testSets.person.DataFrameTests.guess column type for type without classifier
java.lang.IllegalArgumentException: Values of ValueColumn 'a' have types '[DataFrameTests$$Lambda$4183/0x000000010140ac40]' which are not compatible given with column type 'kotlin.Function<*>'
  at org.jetbrains.kotlinx.dataframe.impl.columns.DataColumnImpl.<init>(DataColumnImpl.kt:39)

It was caused by recognizing kotlin.Function<*> types explicitly in 10935d2.

I simply added an additional check in the debug mode for functional types, as the check should not fail for this case.

[github-actions]

Generated sources will be updated after merging this PR.
Please inspect the changes in here.