Rework test to avoid diverging eclipse output

If a record is part of a class some eclipse/ecj versions add the
implicit static modifier to the output and some doesn't. If the record
is nested in another record this doesn't happen.

test/transform/resource/after-ecj/WithOnNestedRecord.java

@@ -1,5 +1,5 @@
 import lombok.With;
-public class WithOnNestedRecord<T> {
+public record WithOnNestedRecord()<T> {
   public @With record Nested(String a, String b) {
 /* Implicit */    private final String a;
 /* Implicit */    private final String b;
@@ -17,7 +17,4 @@ public class WithOnNestedRecord<T> {
       return ((this.b == b) ? this : new WithOnNestedRecord.Nested(this.a, b));
     }
   }
-  public WithOnNestedRecord() {
-    super();
-  }
 }