[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/generics/intersectionGenericWithBoundsOverride.kt.txt

@@ -0,0 +1,126 @@
+class A : Java1<Int>, Java2<Int> {
+  constructor() /* primary */ {
+    super/*Java1*/<@FlexibleNullability Int?>()
+    /* <init>() */
+
+  }
+
+}
+
+class B : Java1<Int>, Java2<Int> {
+  constructor() /* primary */ {
+    super/*Java1*/<@FlexibleNullability Int?>()
+    /* <init>() */
+
+  }
+
+  override fun bar(): Int {
+    return 1
+  }
+
+}
+
+class C<T> : Java1<T>, Java2<T> where T : Number, T : Comparable<T> {
+  constructor() /* primary */ {
+    super/*Java1*/<@FlexibleNullability T?>()
+    /* <init>() */
+
+  }
+
+}
+
+class D<T> : Java1<T>, Java2<T> where T : Number, T : Comparable<T> {
+  constructor() /* primary */ {
+    super/*Java1*/<@FlexibleNullability T?>()
+    /* <init>() */
+
+  }
+
+  override fun foo(t: T) {
+  }
+
+}
+
+class E : Java1<Number>, Java3<Number> {
+  constructor() /* primary */ {
+    super/*Java1*/<@FlexibleNullability Number?>()
+    /* <init>() */
+
+  }
+
+}
+
+class F : Java1<Number>, Java3<Number> {
+  constructor() /* primary */ {
+    super/*Java1*/<@FlexibleNullability Number?>()
+    /* <init>() */
+
+  }
+
+  override fun bar(): Number {
+    return 2
+  }
+
+}
+
+class G : Java1<Int>, KotlinInterface<Int> {
+  constructor() /* primary */ {
+    super/*Java1*/<@FlexibleNullability Int?>()
+    /* <init>() */
+
+  }
+
+}
+
+class H<T : Number?> : Java1<T>, KotlinInterface<T> {
+  constructor() /* primary */ {
+    super/*Java1*/<@FlexibleNullability T?>()
+    /* <init>() */
+
+  }
+
+}
+
+class I : Java1<Int>, KotlinInterface<Int> {
+  constructor() /* primary */ {
+    super/*Java1*/<@FlexibleNullability Int?>()
+    /* <init>() */
+
+  }
+
+  override fun bar(): Int {
+    return 3
+  }
+
+}
+
+interface KotlinInterface<T : Any?> {
+  abstract fun bar(): T?
+
+  abstract fun foo(t: T)
+
+}
+
+fun test(a: A, b: B, c: C<Int>, d: D<Float>, e: E, f: F, g: G, h: H<Int?>, i: I) {
+  a.foo(t = null)
+  a.foo(t = 1)
+  a.bar() /*~> Unit */
+  b.foo(t = null)
+  b.foo(t = 1)
+  b.bar() /*~> Unit */
+  c.foo(t = null)
+  c.foo(t = 1)
+  c.bar() /*~> Unit */
+  d.foo(t = 1.1F)
+  d.bar() /*~> Unit */
+  e.foo(t = 1)
+  e.bar() /*~> Unit */
+  f.foo(t = 2.2)
+  f.bar() /*~> Unit */
+  g.foo(t = 2)
+  g.bar() /*~> Unit */
+  h.foo(t = null)
+  h.bar() /*~> Unit */
+  i.foo(t = null)
+  i.bar() /*~> Unit */
+}