[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/sequenceCollectionIntersectionOverrideKJK.kt

@@ -0,0 +1,91 @@
+// TARGET_BACKEND: JVM
+// JDK_KIND: FULL_JDK_21
+// WITH_STDLIB
+// SEPARATE_SIGNATURE_DUMP_FOR_K2
+// ^ ISSUE: KT-63914, KT-65219
+
+// FILE: 1.kt
+import java.util.*
+
+class A : LinkedList<Int>(), List<Int>
+
+class B :  LinkedList<Int>(), List<Int> {
+    override fun remove(): Int {
+        return 1
+    }
+    override fun removeAt(index: Int): Int {
+        return 1
+    }
+    override fun remove(element: Int): Boolean {
+        return true
+    }
+    override val size: Int
+        get() = 2
+
+    override fun addFirst(e: Int?) {}
+}
+
+class C : LinkedList<Int?>(), MutableList<Int?>
+
+class D : LinkedList<Int?>(), MutableList<Int?>{
+    override fun get(index: Int): Int? {
+        return 2
+    }
+    override fun remove(): Int? {
+        return 2
+    }
+    override fun removeAt(index: Int): Int? {
+        return 2
+    }
+    override fun remove(element: Int?): Boolean {
+        return true
+    }
+
+    override fun addLast(e: Int?) { }
+}
+
+fun test(a: A, b: B, c: C, d: D){
+    a.size
+    a.add(1)
+    a.get(0)
+    a.remove()
+    a.removeAt(1)
+    a.remove(1)
+    a.addFirst(1)
+    a.addLast(null)
+    a.removeFirst()
+    a.removeLast()
+
+    b.size
+    b.add(1)
+    b.get(0)
+    b.remove()
+    b.removeAt(1)
+    b.remove(1)
+    b.addFirst(1)
+    b.addLast(null)
+    b.removeFirst()
+    b.removeLast()
+
+    c.size
+    c.add(1)
+    c.get(0)
+    c.remove()
+    c.removeAt(1)
+    c.remove(1)
+    c.addFirst(1)
+    c.addLast(null)
+    c.removeFirst()
+    c.removeLast()
+
+    d.size
+    d.add(1)
+    d.get(0)
+    d.remove()
+    d.removeAt(1)
+    d.remove(1)
+    d.addFirst(1)
+    d.addLast(null)
+    d.removeFirst()
+    d.removeLast()
+}