Extend tramp--test-check-files (Bug#37228)

* test/lisp/net/tramp-tests.el (tramp--test-check-files): Test also
`directory-files-and-attributes'.  (Bug#37228)
2 jobs for master in 57 minutes and 8 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #3158
test-all

00:57:08

passed #3159
test-filenotify-gio

00:40:26