Implement FIR loading for Java (classes, supertypes, parameters, funs)

Properties aren't implemented yet
FIR symbol provider functions return more specialized types now
Related to KT-28918, KT-29636, KT-29218

#KT-28788 Fixed

idea/testData/fir/multiModule/overrideWithJava/jvm/A.java

@@ -0,0 +1,9 @@
+public class A {
+    public A foo() {
+        return this;
+    }
+
+    public A bar() {
+        return this;
+    }
+}