Finish Tramp reorganization

Finish Tramp reorganization

* lisp/net/tramp-compat.el (subr-x): Don't require.
(top): Use `function-put' but `put'.

* lisp/net/tramp-gvfs.el (tramp-dbus-function): Add declare form.

* lisp/net/tramp-message.el (tramp-byte-run--set-suppress-trace):
New function.  Add it to `defun-declarations-alist'.
(tramp-setup-debug-buffer, tramp-debug-buffer-name)
(tramp-get-debug-buffer, tramp-get-debug-file-name)
(tramp-trace-buffer-name, tramp-debug-message, tramp-message):
Add declare form.
(tramp-debug-buffer-name): Use `tramp-string-empty-or-nil-p'.
(tramp-test-message): New defun.

* lisp/net/tramp.el (top): Use `function-put' but `put'.
(tramp-file-name-user-domain, tramp-file-name-host-port)
(tramp-file-name-port-or-default, tramp-file-name-unify)
(tramp-dissect-file-name, tramp-ensure-dissected-file-name)
(tramp-dissect-hop-name, tramp-make-tramp-file-name)
(tramp-signal-hook-function, tramp-post-process-creation)
(tramp-read-passwd, tramp-read-passwd-without-cache)
(tramp-clear-passwd): Add declare form.
(tramp-string-empty-or-nil-p): Add ;;;###tramp-autoload cookie.
(tramp-test-message): Move to tramp-message.el.