fix: Don't error when processing a rule that uses a removed plugin.
fix: Don't error when processing a rule that uses a removed plugin.

Since we removed the hipchat plugin rules that reference it are throwing errors. No need to do so,
just ignore those actions.

Fixes SENTRY-AHV

mvaled/sentry,mvaled/sentry,mvaled/sentry,beeftornado/sentry,mvaled/sentry,beeftornado/sentry,mvaled/sentry,beeftornado/sentry,mvaled/sentry