Diktat should suggest to override equals and hashcode for Arrays

[akuleshov7]

If you will do the following:

data class SimpleArray(val a: Array<Long>)

and after that will try to do something like

assertEquals(SimpleArray(arrayOf(1)), SimpleArray(arrayOf(1)))

you will obviously get false. But sometimes it's easy to forget it, when you are working with Lists for a long period of time (because Lists will work in Kotlin-like style in the same case).