replace-tests.el: Fix broken tests

replace-tests.el: Fix broken tests

After previous commit, all tests using helper function
`replace-tests-clauses' fail: during the expansion
of macro `replace-tests-with-undo', the function
`replace-tests-clauses' is unbound.

Delete those helpers and reimplement test
`query-replace-undo-bug31538'.
* test/lisp/replace-tests.el (query-replace-undo-bug31538):
Reimplement this test without using any helper function/macro.