[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/sequenceCollectionOverride.kt

@@ -0,0 +1,125 @@
+// TARGET_BACKEND: JVM
+// JDK_KIND: FULL_JDK_21
+// WITH_STDLIB
+
+// FILE: Java1.java
+import java.util.SequencedCollection;
+public abstract class Java1 implements SequencedCollection<Integer> { }
+
+// FILE: Java2.java
+public interface Java2 {
+    int getFirst();
+}
+
+// FILE: Java3.java
+public abstract class Java3 implements KotlinInterface { }
+
+// FILE: 1.kt
+import java.util.*
+
+abstract class A : SequencedCollection<Int>
+
+abstract class B(override val size: Int) :  SequencedCollection<Int> {
+    override fun removeFirst(): Int {
+        return 1
+    }
+
+    override fun reversed(): SequencedCollection<Int> {
+        return null!!
+    }
+}
+
+abstract class C : Java1()  // Kotlin ← Java1 ←Java2
+
+abstract class D : Java1() {
+    override val size: Int
+        get() = 5
+
+    override fun remove(element: Int?): Boolean {
+        return true
+    }
+
+    override fun reversed(): SequencedCollection<Int> {
+        return null!!
+    }
+
+    override fun removeFirst(): Int {
+        return 2
+    }
+}
+
+abstract class E(override val size: Int) : Java1(), Java2 { //Kotlin ← Java1, Java2  ← Java3
+    override fun getFirst(): Int {
+        return 2
+    }
+}
+
+abstract class F : KotlinInterface, Java2 { //Kotlin ← Java, Kotlin2 ← Java2
+    override fun getFirst(): Int {
+        return 2
+    }
+}
+
+abstract class G : Java3()  //Kotlin ← Java ← Kotlin ← Java
+
+interface KotlinInterface : SequencedCollection<Int>
+
+fun test(a: A, b: B, c: C, d: D, e: E, f: F, g: G) {
+    a.addFirst(1)
+    a.addLast(null)
+    a.first
+    a.last
+    a.first()
+    a.last()
+    a.removeFirst()
+    a.removeLast()
+    a.reversed()
+
+    b.addFirst(1)
+    b.addLast(null)
+    b.first
+    b.last
+    b.removeFirst()
+    b.removeLast()
+    b.reversed()
+
+    c.addFirst(1)
+    c.addLast(null)
+    c.first
+    c.last
+    c.removeFirst()
+    c.removeLast()
+    c.reversed()
+
+    d.removeFirst()
+    d.removeLast()
+    d.addFirst(1)
+    d.addLast(null)
+    d.reversed()
+    d.first
+    d.last
+
+    e.first
+    e.last
+    e.removeFirst()
+    e.removeLast()
+    e.addFirst(1)
+    e.addLast(null)
+    e.reversed()
+
+    f.first
+    f.last
+    f.removeFirst()
+    f.removeLast()
+    f.addFirst(1)
+    f.addLast(null)
+    f.reversed()
+
+    g.first
+    g.last
+    g.removeFirst()
+    g.removeLast()
+    g.addFirst(1)
+    g.addLast(null)
+    g.reversed()
+}