Tag expensive tests in tramp-archive.el (Bug#30807)

Tag expensive tests in tramp-archive.el  (Bug#30807)

* test/lisp/net/tramp-archive-tests.el (tramp-archive-test44-auto-load)
(tramp-archive-test44-delay-load): Rename.
(tramp-archive-test07-file-exists-p)
(tramp-archive-test08-file-local-copy)
(tramp-archive-test09-insert-file-contents)
(tramp-archive-test11-copy-file)
(tramp-archive-test15-copy-directory)
(tramp-archive-test16-directory-files)
(tramp-archive-test17-insert-directory)
(tramp-archive-test18-file-attributes)
(tramp-archive-test19-directory-files-and-attributes)
(tramp-archive-test20-file-modes)
(tramp-archive-test21-file-links)
(tramp-archive-test26-file-name-completion)
(tramp-archive-test44-auto-load)
(tramp-archive-test44-delay-load): Tag them as :expensive-test,
because they run longer than 10 seconds.  (Bug#30807)