Bring CallFinder from Logging

[alexander-yevsyukov]

This PR brings the class CallerFinder from Logging framework (nee io.spine.logging.flogger.util.CallerFinder) to become the part of reflect library.

The reason for starting this transition is that we have already the second occasion for the feature of knowing a class calling another class. More specifically, the need for such an ability was discovered when developing PipelineSetup utility in ProtoData. We need to know the class which creates an instance of PipelineSetup so that we can use the ClassLoader of the class for loading its resources from within PipelineSetup instance.

Apart from brining CallerFinder and related classes and tests, the associated code in Java was converted to Kotlin.

Also the following refactorings were made:

• CallerFinder.getStackForCallerOf() was renamed to stackForCallerOf().
• StackGetter.getStackForCaller() was renamed to stackForCaller().

Future actions

• The Logging library need to be migrated to the code introduced by this PR.