Remove dead subcommand from publisher and switch to regex-lite (#3560)

This PR removes the now unused upgrade-runtime-crates-version subcommand
from publisher, and also switches it to regex-lite since it doesn't need
the full regex feature set.

----

_By submitting this pull request, I confirm that you can use, modify,
copy, and redistribute this contribution, under the terms of your
choice._

---------

Co-authored-by: ysaito1001 <awsaito@amazon.com>