Revert use of powershell in Tramp, there are collateral damages

* lisp/net/tramp-sh.el (tramp-methods) <sshx, scpx>: Fix quoting
for MS Windows.
(tramp-connection-properties): Don't set "encoding-shell".
(tramp-actions-before-shell): Remove `tramp-no-job-control-regexp'.
(tramp-maybe-open-connection): Revert changes for "encoding-shell".

* lisp/net/tramp.el (tramp-no-job-control-regexp): Remove.
3 jobs for master in 11 minutes and 23 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Fast
passed #16562
test-fast-inotify

00:08:47

 
  Normal
passed #16563
test-lisp-inotify

00:02:35

passed #16564
test-lisp-net-inotify

00:01:57