change signature: don't ask about covariant overrides when types are equal, e.g. when super type is changed based on override method return type

type annotations: ensure annotations are cloned so invalidating initial type doesn't break the consequence refactoring
EA-93296 - PIEAE: PsiUtilCore.ensureValid

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/superMethodReturn/afterTypeAnno.java

@@ -0,0 +1,20 @@
+// "Make 'a.f' return 'java.util.List<java.lang.@N String>'" "true"
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Target;
+import java.util.List;
+
+@Target({ElementType.TYPE_USE})
+@interface N {}
+
+class a {
+ List<@N String> f() {
+   return ;
+ }
+}
+
+class b extends a {
+  List<@N String> f() {
+    return null;
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/superMethodReturn/beforeTypeAnno.java

@@ -0,0 +1,20 @@
+// "Make 'a.f' return 'java.util.List<java.lang.@N String>'" "true"
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Target;
+import java.util.List;
+
+@Target({ElementType.TYPE_USE})
+@interface N {}
+
+class a {
+ void f() {
+   return ;
+ }
+}
+
+class b extends a {
+  <caret>List<@N String> f() {
+    return null;
+  }
+}