Fix obsolete ‘test/automated’ references

Fix obsolete ‘test/automated’ references

* Makefile.in (mostlyclean, clean, maybeclean_dirs, distclean)
(bootstrap-clean, maintainer-clean):
Clean ‘test’, not ‘test/automated’.  Test for existence of
subdirectory only for ‘test’, not for directories that should
always exist.
* admin/MAINTAINERS, etc/TODO, lisp/emacs-lisp/bytecomp.el:
* lisp/emacs-lisp/seq.el, lisp/emacs-lisp/thunk.el:
* lisp/man.el (Man-parse-man-k):
* lisp/url/url-domsuf.el, make-dist:
* test/file-organization.org:
Fix obsolete references to test/automated.