ci: Fix various issues found after deploying !1625

ci: Fix gst-plugins-rs being built before gen-cache

--exclude wasn't working on android and ios because it was getting
pulled in by gst-android-1.0 and gstreamer-ios-templates

Revert "cache: Always use a tar command on Windows"

This reverts commit b87ac44dcdf2902b01bbd497f42a56c640b69a1f.

Creation of the tarball *still* hangs on MSVC CI, even with gtar and
MSYS2:

https://gitlab.freedesktop.org/gstreamer/cerbero/-/jobs/66199322

https://gitlab.freedesktop.org/gstreamer/cerbero/-/jobs/66218095

cache: Don't verbosely list files while creating a cache

This slows down the creation, and also spams the log so much that it
makes the build log unreadable.

It was originally added for debug purposes anyway.

ci: Don't package norust variant for gst-plugins-rs trigger CI