Move JVM specific proto comparison tests to separate dir

Original commit: 5dd4e4cdd4

jps/jps-plugin/testData/comparison/jvmOnly/classToFileFacade/new.kt

@@ -0,0 +1,3 @@
+package test
+
+public fun main() {}

jps/jps-plugin/testData/comparison/jvmOnly/classToFileFacade/old.kt

@@ -0,0 +1,13 @@
+package test
+
+public class TestPackage {
+    public fun main() {}
+}
+
+public class MainKt {
+    companion object {
+        @JvmStatic
+        public fun main() {
+        }
+    }
+}

jps/jps-plugin/testData/comparison/jvmOnly/classToFileFacade/result.out

@@ -0,0 +1,3 @@
+REMOVED: class MainKt$Companion.class
+REMOVED: class TestPackage.class
+changes in test/MainKt: CLASS_SIGNATURE