[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/collections/set/intersectionSetOverrideKJK.kt.txt

@@ -0,0 +1,49 @@
+abstract class A : HashSet<Any>, SortedSet<Any> {
+  constructor() /* primary */ {
+    super/*HashSet*/<Any>()
+    /* <init>() */
+
+  }
+
+  override fun spliterator(): Spliterator<Any> {
+    return CHECK_NOT_NULL<Nothing>(arg0 = null)
+  }
+
+}
+
+abstract class B : HashSet<Any>, SortedSet<Any> {
+  constructor() /* primary */ {
+    super/*HashSet*/<Any>()
+    /* <init>() */
+
+  }
+
+  override fun remove(element: Any): Boolean {
+    return true
+  }
+
+  override fun spliterator(): Spliterator<Any> {
+    return CHECK_NOT_NULL<Nothing>(arg0 = null)
+  }
+
+  override val size: Int
+    override get(): Int {
+      return 5
+    }
+
+}
+
+fun test(a: A, b: B) {
+  a.<get-size>() /*~> Unit */
+  a.add(element = 1) /*~> Unit */
+  a.add(element = null) /*~> Unit */
+  a.first() /*~> Unit */
+  a.remove(element = 1) /*~> Unit */
+  a.removeAll(elements = listOf<Nothing?>(element = null)) /*~> Unit */
+  b.<get-size>() /*~> Unit */
+  b.add(element = 1) /*~> Unit */
+  b.add(element = null) /*~> Unit */
+  b.first() /*~> Unit */
+  b.remove(element = 1) /*~> Unit */
+  b.removeAll(elements = listOf<Nothing?>(element = null)) /*~> Unit */
+}