Hackbot fails to render try push links

[jensstutte]

"Sorry — the link in my earlier comment didn't render. Fresh mach try auto push of the new diff: {{actions.tryauto.url}}"

See https://phabricator.services.mozilla.com/D321460#11172457

[suhaibmujahid]

This is related to #6723

[suhaibmujahid]

We might want to consider abort applying the rest of the actions when one files, at least if the failed action is referenced by other actions.