Add alerts for when pushes to `next` break the build

[Velfi]

Tell us about your request

In order for the sync bot to be able to push directly to the next branch, we had to remove the required checks. We should still run the checks on push to next but emit an alert when the checks fail. main still requires checks to pass so we're protected even if we do nothing, but adding these alerts would increase our ability to detect faults early.

Tell us about the problem you're trying to solve.

Checks for the next branch have been disabled

Are you currently working around this issue?

n/a

Additional context

No response