[Test] KT-61360: add tests for the IrFakeOverrideBuilder

Add tests for fake overrides with focus on java interoperability

Co-authored-by: Aleksandra Arsenteva <aleksandra.arsenteva@jetbrains.com>

compiler/testData/ir/irText/fakeOverrides/methodparameters/intersectionJavaThisOverride.sig.kt.txt

@@ -0,0 +1,71 @@
+// CHECK:
+//   Mangled name: A
+//   Public signature: /A|null[0]
+class A : Java1, Java2 {
+  // CHECK:
+  //   Mangled name: A#<init>(){}
+  //   Public signature: /A.<init>|-5645683436151566731[0]
+  //   Public signature debug description: <init>(){}
+  constructor() /* primary */
+
+  // CHECK:
+  //   Mangled name: A#foo(){}
+  //   Public signature: /A.foo|-1041209573719867811[0]
+  //   Public signature debug description: foo(){}
+  /* fake */ override fun foo(): Unit
+
+}
+
+// CHECK:
+//   Mangled name: B
+//   Public signature: /B|null[0]
+class B : Java1, Java2 {
+  // CHECK:
+  //   Mangled name: B#<init>(){}
+  //   Public signature: /B.<init>|-5645683436151566731[0]
+  //   Public signature debug description: <init>(){}
+  constructor() /* primary */
+
+  // CHECK:
+  //   Mangled name: B#foo(){}
+  //   Public signature: /B.foo|-1041209573719867811[0]
+  //   Public signature debug description: foo(){}
+  override fun foo(): Unit
+
+}
+
+// CHECK:
+//   Mangled name: C
+//   Public signature: /C|null[0]
+class C : Java1, KotlinInterface {
+  // CHECK:
+  //   Mangled name: C#<init>(){}
+  //   Public signature: /C.<init>|-5645683436151566731[0]
+  //   Public signature debug description: <init>(){}
+  constructor() /* primary */
+
+  // CHECK:
+  //   Mangled name: C#foo(){}
+  //   Public signature: /C.foo|-1041209573719867811[0]
+  //   Public signature debug description: foo(){}
+  override fun foo(): Unit
+
+}
+
+// CHECK:
+//   Mangled name: KotlinInterface
+//   Public signature: /KotlinInterface|null[0]
+interface KotlinInterface {
+  // CHECK:
+  //   Mangled name: KotlinInterface#foo(){}
+  //   Public signature: /KotlinInterface.foo|-1041209573719867811[0]
+  //   Public signature debug description: foo(){}
+  abstract fun foo(): Unit
+
+}
+
+// CHECK:
+//   Mangled name: #test(A;B;C){}
+//   Public signature: /test|-4981009800298118531[0]
+//   Public signature debug description: test(A;B;C){}
+fun test(a: A, b: B, c: C): Unit