[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/basicGenericWithBoundsOverride.kt

@@ -0,0 +1,67 @@
+// TARGET_BACKEND: JVM
+
+// FILE: Java1.java
+public class Java1<T extends Number> {
+    public void foo(T t) { }
+    public T bar() {
+        return null;
+    }
+}
+
+// FILE: Java2.java
+public interface Java2<T extends Number&Comparable>  {
+    public void foo(T t);
+    public T bar();
+}
+
+// FILE: Java3.java
+public interface Java3 {
+    <U extends Number> void foo(U a);
+    <U extends Number> U bar();
+}
+
+// FILE: 1.kt
+class A: Java1<Int>()
+
+class B : Java1<Int>() {
+    override fun bar(): Int {
+        return 1
+    }
+    override fun foo(t: Int?) {}
+}
+
+abstract class C : Java2<Double>
+
+class D : Java2<Double> {
+    override fun foo(t: Double) { }
+    override fun bar(): Double {
+        return 1.1
+    }
+}
+
+abstract class E : Java3
+
+class F : Java3 {
+    override fun <U : Number> foo(a: U) { }
+    override fun <U : Number> bar(): U {
+        return null!!
+    }
+}
+
+fun test(a: A, b: B, c: C, d: D, e: E, f: F) {
+    a.foo(null)
+    a.foo(1)
+    a.bar()
+    b.foo(null)
+    b.foo(1)
+    b.bar()
+    c.foo(null)
+    c.foo(1.1)
+    c.bar()
+    d.foo(1.1)
+    d.bar()
+    e.foo(1)
+    e.bar<Int>()
+    f.foo(2.2)
+    f.bar<Double>()
+}