Add JVM ABI K1/K2 consistency tests

compiler/testData/codegen/box/safeCall/kt52743.jvm_abi.txt

@@ -0,0 +1,9 @@
+MODULE main
+	CLASS Kt52743Kt.class
+		PACKAGE METADATA
+			FUNCTION nullableFun()Ljava/lang/Object;
+				Property: class.metadata.function.typeParameters
+					K1
+						<T#0 /* T */>
+					K2
+						<T#0 /* T */ : kotlin/Any?>

compiler/testData/codegen/box/safeCall/kt52743.kt

@@ -1,3 +1,5 @@
+// JVM_ABI_K1_K2_DIFF: KT-63855
+
 fun <T: Any?> nullableFun(): T {
     return null as T
 }