[utility] Refactor rsync_scp wrapper function and add completion support

Changes:
- Rename `rsync_scp_wrap` to `noremoteglob` and make it more generally usable
- Enable completion support for commands wrapped with `noremoteglob`
- Tighten up internal variable usages
- Update documentation for 'noremoteglob' function

modules/utility/functions/_noremoteglob

@@ -0,0 +1,11 @@
+#compdef noremoteglob
+#autoload
+
+#
+# Completes noremoteglob.
+#
+# Authors:
+#   Indrajit Raychaudhuri <irc+code@indrajit.com>
+#
+
+_precommand