Fix mutable collection stub methods generation for corner case

The problem is that
`override fun remove(element: E): CollectionWithRemove<E>`
seems to be illegal from Java's point of view, while it's OK for JVM

These declarations have the same signature (return type is isgnored)
- override fun remove(element: E): CollectionWithRemove<E>
- override fun remove(element: E): Boolean

When we meet such declaration we choose random declaration for fake override in synthetic class
that may lead to signature clash

compiler/tests/org/jetbrains/kotlin/codegen/BlackBoxCodegenTestGenerated.java

@@ -1276,12 +1276,24 @@ public class BlackBoxCodegenTestGenerated extends AbstractBlackBoxCodegenTest {
             doTest(fileName);
         }
 
+        @TestMetadata("customReadOnlyIterator.kt")
+        public void testCustomReadOnlyIterator() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/builtinStubMethods/customReadOnlyIterator.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("delegationToArrayList.kt")
         public void testDelegationToArrayList() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/builtinStubMethods/delegationToArrayList.kt");
             doTest(fileName);
         }
 
+        @TestMetadata("immutableRemove.kt")
+        public void testImmutableRemove() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/builtinStubMethods/immutableRemove.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("implementationInTrait.kt")
         public void testImplementationInTrait() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/codegen/box/builtinStubMethods/implementationInTrait.kt");