[FIR-TEST] Add new testdata generated after changes in previous commit

compiler/testData/diagnostics/tests/delegation/DelegationAndOverriding.fir.kt

@@ -0,0 +1,38 @@
+package override
+
+interface T {
+    fun foo()
+    val v : Int
+}
+
+open class Br(t : T) : T {
+
+}
+
+class Br3(t : T) : Br(t) {
+
+}
+
+open class Br1(t : T) : T by t {
+
+}
+
+class Br2(t : T) : Br1(t) {
+
+}
+
+interface G<T> {
+    fun foo(t : T) : T
+}
+
+class GC() : G<Int> {
+
+}
+
+open class GC1(g : G<Int>) : G<Int> by g {
+
+}
+
+open class GC2(g : G<Int>) : GC1(g) {
+
+}