[FIR] Add test for ambiguity in nested class constructor call

compiler/fir/resolve/testData/resolve/nestedClassContructor.kt

@@ -0,0 +1,5 @@
+class A() {
+    class B() : A() {
+        fun copy() = <!AMBIGUITY!>B<!>()
+    }
+}

compiler/fir/resolve/testData/resolve/nestedClassContructor.txt

@@ -0,0 +1,18 @@
+FILE: nestedClassContructor.kt
+    public final class A : R|kotlin/Any| {
+        public constructor(): R|A| {
+            super<R|kotlin/Any|>()
+        }
+
+        public final class B : R|A| {
+            public constructor(): R|A.B| {
+                super<R|A|>()
+            }
+
+            public final fun copy(): <ERROR TYPE REF: Empty diagnostic> {
+                ^copy <Ambiguity: B, [/A.B.B, /A.B.B]>#()
+            }
+
+        }
+
+    }

compiler/fir/resolve/tests/org/jetbrains/kotlin/fir/FirDiagnosticsTestGenerated.java

@@ -133,6 +133,11 @@ public class FirDiagnosticsTestGenerated extends AbstractFirDiagnosticsTest {
         runTest("compiler/fir/resolve/testData/resolve/nestedClass.kt");
     }
 
+    @TestMetadata("nestedClassContructor.kt")
+    public void testNestedClassContructor() throws Exception {
+        runTest("compiler/fir/resolve/testData/resolve/nestedClassContructor.kt");
+    }
+
     @TestMetadata("NestedOfAliasedType.kt")
     public void testNestedOfAliasedType() throws Exception {
         runTest("compiler/fir/resolve/testData/resolve/NestedOfAliasedType.kt");