Introduce initial version of FIR Java type enhancement

Java type enhancement is performed by a special scope kind
Java FIR dump was added for multiplatform tests to look at enhancements
Overrides, J2K mapping, special cases does not work yet

Related to KT-29937

idea/testData/fir/multiModule/basicWithJavaFakeOverride/extraDump.java.txt

@@ -0,0 +1,4 @@
+<T> public open class A : R|java/lang/Object| {
+    public open operator function foo(t: R|ft<T, T?>|!): R|ft<T, T?>|!
+
+}

idea/testData/fir/multiModule/basicWithJavaFakeOverride/jvm/simpleFakeOverride.txt

@@ -7,7 +7,7 @@ FILE: simpleFakeOverride.kt
         public constructor(): super<R|A<Some>|>()
 
         public final function test(): R|kotlin/Unit| {
-            R|FakeOverride</A.foo: R|ft<T, T>|!>|(<Unresolved name: Some>#())
+            R|FakeOverride</A.foo: R|ft<T, T?>|!>|(<Unresolved name: Some>#())
         }
 
     }