This PR will add in some code to pre-pull the installer image before we
run an upgrade of a given talos node. Additionally, this will add some
functional args to the install package to allow for specifying whether
or not to pull the installer image. This was needed since there was no
sense in pulling the installer again once we made it that far into the
upgrade process.
Signed-off-by: Spencer Smith <robertspencersmith@gmail.com>
