[FIR2IR] Unwrap call-site substitution overrides

Generating IR declarations for use-site substitution overrides leads
to IR that is different from K1 as well as problems in signature
generation which relies on mangling. Use-site substitutions can contain
references to type parameters from the call-site which aren't handled
in mangling.

#KT-57022 Fixed

compiler/testData/ir/irText/firProblems/SignatureComputationComplexJavaGeneric.sig.kt.txt

@@ -1,25 +1,65 @@
 // CHECK:
-//   Mangled name: Test
-//   Public signature: /Test|null[0]
-class Test<T : Any?> : J<T> {
+//   Mangled name: Inv
+//   Public signature: /Inv|null[0]
+class Inv<T : Any?> {
   // CHECK:
-  //   Mangled name: Test{}x
-  //   Public signature: /Test.x|-8060530855978347579[0]
+  //   Mangled name: Inv{}x
+  //   Public signature: /Inv.x|-8060530855978347579[0]
   val x: T
     // CHECK JVM_IR:
-    //   Mangled name: Test#<get-x>(){}1:0
-    //   Public signature: /Test.x.<get-x>|-8893883356128097563[0]
+    //   Mangled name: Inv#<get-x>(){}1:0
+    //   Public signature: /Inv.x.<get-x>|-8893883356128097563[0]
     get
 
   // CHECK:
-  //   Mangled name: Test#<init>(1:0){}
-  //   Public signature: /Test.<init>|-8731461708390519279[0]
+  //   Mangled name: Inv#<init>(1:0){}
+  //   Public signature: /Inv.<init>|-8731461708390519279[0]
   constructor(x: T) /* primary */
 
-  // CHECK:
-  //   Mangled name: Test#test(J.B<1:0>){}
-  //   Public signature: /Test.test|7386642793853999047[0]
-  fun test(b: B<T>): Unit
-
 }
 
+// CHECK:
+//   Mangled name: Test_1
+//   Public signature: /Test_1|null[0]
+class Test_1<TT : Any?> : JavaClass1<TT> {
+  // CHECK:
+  //   Mangled name: Test_1{}x
+  //   Public signature: /Test_1.x|-8060530855978347579[0]
+  val x: TT
+    // CHECK JVM_IR:
+    //   Mangled name: Test_1#<get-x>(){}1:0
+    //   Public signature: /Test_1.x.<get-x>|-8893883356128097563[0]
+    get
+
+  // CHECK:
+  //   Mangled name: Test_1#<init>(1:0){}
+  //   Public signature: /Test_1.<init>|-8731461708390519279[0]
+  constructor(x: TT) /* primary */
+
+  // CHECK:
+  //   Mangled name: Test_1#test(JavaClass1.B<1:0>){}
+  //   Public signature: /Test_1.test|-4347685660863074857[0]
+  fun test(b: B<TT>): Unit
+
+}
+
+// CHECK:
+//   Mangled name: Test_2
+//   Public signature: /Test_2|null[0]
+class Test_2<TT : Any?> : JavaClass2<TT, Inv<TT>> {
+  // CHECK:
+  //   Mangled name: Test_2#<init>(){}
+  //   Public signature: /Test_2.<init>|-5645683436151566731[0]
+  constructor() /* primary */
+
+  // CHECK:
+  //   Mangled name: Test_2#process(JavaClass2.B<1:0,Inv<1:0>>){}
+  //   Public signature: /Test_2.process|4196267472785317094[0]
+  fun process(b: B<TT, Inv<TT>>): Unit
+
+}
+
+// CHECK:
+//   Mangled name: #test_3(JavaClass1.B<0:0>;0:0){0§<kotlin.Any?>}
+//   Public signature: /test_3|8017402258673595148[0]
+fun <R : Any?> test_3(jb: B<R>, r: R): Unit