Use `process-live-p' in Tramp

Use `process-live-p' in Tramp

* lisp/net/tramp-compat.el (tramp-compat-process-live-p): New defun.

* lisp/net/tramp.el (tramp-connectable-p, tramp-handle-file-remote-p)
(tramp-handle-file-notify-valid-p)
(tramp-action-process-alive, tramp-action-out-of-band)
(tramp-wait-for-regexp):
* lisp/net/tramp-adb.el (tramp-adb-parse-device-names)
(tramp-adb-maybe-open-connection):
* lisp/net/tramp-cache.el (tramp-get-connection-property):
* tramp-gvfs.el (tramp-gvfs-handle-file-notify-add-watch):
* lisp/net/tramp-gw.el (tramp-gw-gw-proc-sentinel)
(tramp-gw-aux-proc-sentinel, tramp-gw-open-connection):
* tramp-sh.el (tramp-process-sentinel)
(tramp-sh-handle-file-notify-add-watch)
(tramp-maybe-open-connection):
* lisp/net/lisp/net/lisp/net/tramp-smb.el (tramp-smb-action-with-tar)
(tramp-smb-handle-copy-directory, tramp-smb-action-get-acl)
(tramp-smb-handle-process-file, tramp-smb-action-set-acl)
(tramp-smb-get-cifs-capabilities)
(tramp-smb-get-stat-capability)
(tramp-smb-maybe-open-connection, tramp-smb-wait-for-output)
(tramp-smb-kill-winexe-function): Use it.