KT-12330 Improve bytecode for data class equals/hashCode methods

- Do not longer call hashCode on java/lang/Object but do this
on statically checked type.
- Do not longer call Intrinsics.areEqual but use directly
equals method on statically checked type.

Fix of https://youtrack.jetbrains.com/issue/KT-12330

compiler/testData/codegen/bytecodeText/dataClasses/kt12330.kt

@@ -0,0 +1,4 @@
+data class D(val x: List<String>)
+
+// 1 INVOKEVIRTUAL java/lang/Object.hashCode
+// 1 INVOKEVIRTUAL java/lang/Object.equals