We shouldn't generate tests for synthetic methods of data classes

[volivan239]

Description

Kotlin automatically generates some methods for data classes, however, we shouldn't test them unless they are overridden manually.

To Reproduce

Create data class with no methods and launch action on it:

data class Datalass(val x: Int, val y: Int)

Expected behavior

Action is disabled

Actual behavior

Dialog appears with synthetic methods being proposed for testing

Visual proofs (screenshots, logs, images)

Additional context

The issue looks like a "Kotlin edition" of #457