Don't use LOCKNAME for temp files in Tramp (Bug#49406)

Don't use LOCKNAME for temp files in Tramp (Bug#49406)

* lisp/net/tramp.el (tramp-handle-write-region):
* lisp/net/tramp-adb.el (tramp-adb-handle-write-region):
* lisp/net/tramp-sh.el (tramp-sh-handle-write-region):
* lisp/net/tramp-smb.el (tramp-smb-handle-write-region):
* lisp/net/tramp-sshfs.el (tramp-sshfs-handle-write-region):
Don't use LOCKNAME for temp file.  (Bug#49406)

* test/lisp/shadowfile-tests.el (password-cache-expiry):
Set `shadow-debug' also on emba.