adapt testdata to inferred jdk annotations

java/java-tests/testData/codeInsight/completion/smartType/DiamondNotCollapsedInCaseOfAnonymousClasses-out.java

@@ -16,6 +16,7 @@ class MyClass {
             return super.clone();
         }
 
+        @NotNull
         @Override
         public String toString() {
             return super.toString();

java/java-tests/testData/codeInsight/completion/smartType/NewAnonymousFunction-out.java

@@ -16,6 +16,7 @@ class A {
           return super.clone();
       }
 
+      @NotNull
       @Override
       public String toString() {
           return super.toString();

java/java-tests/testData/codeInsight/nullityinferrer/afterMethodReturnValue.java

@@ -15,6 +15,7 @@ class Test {
     return s;
   }
 
+  @NotNull
   String foo4(@NotNull String s) {
     return s.substring(0);
   }

java/java-tests/testData/codeInsight/overrideImplement/afterOverrideExtensionMethods.java

@@ -27,6 +27,7 @@ class MyClass<T> implements A<T> {
         return super.clone();
     }
 
+    @NotNull
     @Override
     public String toString() {
         return super.toString();