[jOOQ/jOOQ#9242] Fix implementation of AbstractKey#equals(Object)

Since keys can be unnamed, the implementation must also compare using
the `fields` instance field.

jOOQ/src/main/java/org/jooq/impl/AbstractKey.java

@@ -127,6 +127,8 @@ abstract class AbstractKey<R extends Record> implements Key<R> {
         }
         else if (!table.equals(other.table))
             return false;
+        else if (!Arrays.equals(fields, other.fields))
+            return false;
         return true;
     }