Some Tramp optimizations

Some Tramp optimizations

* lisp/net/tramp-sh.el (tramp-perl-file-name-all-completions):
Extend.  It shall return also some basic file attributes.
(tramp-bundle-read-file-names): Simplify data to be transferred.
(tramp-sh-handle-file-name-all-completions): Read additional attributes.
(tramp-sh-handle-expand-file-name): Check also "doas".
(tramp-bundle-read-file-names): Handle changed data layout.
(tramp-find-file-exists-command): Set "file-exists-p" file property.