runtime(glvs): update GetLatestVimScripts plugin

runtime(glvs): update GetLatestVimScripts plugin

GetLatestVimScripts builtin plugin required several fixes:
* Support for the new vimbal `.vmb` extension introduced in
  [patch 9.0.1797](https://github.com/vim/vim/commit/f97f6bbf56408c0c97b4ddbe81fba858d7455b0d):
  Vimball/Visual Basic filetype detection conflict
* Update the urls from the old `sourceforge.net` to `vim.org`.
  The download url was hardcoded and a new variable is introduced.
* Fix `curl` command line option to set a filename (`-O` uses the remote
  filename and `-o` specifies a filename).
* Replace windows' command to move files. `REN` can only rename files and
  the script actually moves them. My educated guess was that originally
  only renaming was necessary. When the script was modified to move
  files no change was required on linux because `mv` does both.
* Fix Autoinstall support to check `ftplugins` and `pack-plugins` too
  (`pack-plugins` did not exist when the plugin was created).

closes: #15640

Signed-off-by: GuyBrush <miguel.barro@live.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>