[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/java21/sequenceSetIntersectionOverrideKJK.kt.txt

@@ -0,0 +1,79 @@
+abstract class A : SortedSet<Int>, Set<Int> {
+  constructor() /* primary */ {
+    super/*Any*/()
+    /* <init>() */
+
+  }
+
+}
+
+abstract class B : SortedSet<Int>, Set<Int> {
+  override val size: Int
+    field = size
+    override get
+
+  constructor(size: Int) /* primary */ {
+    super/*Any*/()
+    /* <init>() */
+
+  }
+
+  override fun first(): Int {
+    return 1
+  }
+
+  override fun reversed(): SortedSet<Int> {
+    return CHECK_NOT_NULL<Nothing>(arg0 = null)
+  }
+
+}
+
+abstract class C : SortedSet<Int?>, MutableSet<Int?> {
+  constructor() /* primary */ {
+    super/*Any*/()
+    /* <init>() */
+
+  }
+
+}
+
+abstract class D : SortedSet<Int?>, MutableSet<Int?> {
+  constructor() /* primary */ {
+    super/*Any*/()
+    /* <init>() */
+
+  }
+
+  override fun addLast(e: Int?) {
+  }
+
+  override fun reversed(): SortedSet<Int?>? {
+    return CHECK_NOT_NULL<Nothing>(arg0 = null)
+  }
+
+}
+
+fun test(a: A, b: B, c: C, d: D) {
+  a.<get-size>() /*~> Unit */
+  a.add(element = 1) /*~> Unit */
+  a.remove(element = 1) /*~> Unit */
+  a.addFirst(p0 = 1)
+  a.addLast(p0 = null)
+  a.removeFirst() /*~> Unit */
+  a.removeLast() /*~> Unit */
+  a.reversed() /*~> Unit */
+  a.getFirst() /*~> Unit */
+  b.reversed() /*~> Unit */
+  b.getFirst() /*~> Unit */
+  c.<get-size>() /*~> Unit */
+  c.add(element = 1) /*~> Unit */
+  c.remove(element = 1) /*~> Unit */
+  c.addFirst(p0 = 1)
+  c.addLast(p0 = null)
+  c.removeFirst() /*~> Unit */
+  c.removeLast() /*~> Unit */
+  c.reversed() /*~> Unit */
+  c.getFirst() /*~> Unit */
+  d.reversed() /*~> Unit */
+  d.addLast(e = null)
+}