[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/map/intersectionMapOverrideKJK.kt.txt

@@ -0,0 +1,38 @@
+abstract class A : SortedMap<Boolean, Boolean>, Map<Boolean, Boolean> {
+  constructor() /* primary */ {
+    super/*Any*/()
+    /* <init>() */
+
+  }
+
+}
+
+abstract class B : SortedMap<Boolean, Boolean>, Map<Boolean, Boolean> {
+  constructor() /* primary */ {
+    super/*Any*/()
+    /* <init>() */
+
+  }
+
+  override fun put(key: Boolean, value: Boolean): Boolean? {
+    return false
+  }
+
+  override fun remove(key: Boolean?): Boolean? {
+    return false
+  }
+
+}
+
+fun test(a: A, b: B) {
+  a.<get-size>() /*~> Unit */
+  a.set<@FlexibleNullability Boolean?, @FlexibleNullability Boolean?>(key = true, value = true)
+  a.put(key = null, value = null) /*~> Unit */
+  a.get(key = true) /*~> Unit */
+  a.get(key = null) /*~> Unit */
+  a.remove(key = null) /*~> Unit */
+  a.remove(key = true) /*~> Unit */
+  b.put(key = false, value = false) /*~> Unit */
+  b.set<@FlexibleNullability Boolean?, @FlexibleNullability Boolean?>(key = true, value = true)
+  b.remove(key = null) /*~> Unit */
+}