Related to https://github.com/grafana/oncall-private/issues/2831
## Checklist
- [ ] Unit, integration, and e2e (if applicable) tests updated
- [ ] Documentation added (or `pr:no public docs` PR label added if not
required)
- [ ] Added the relevant release notes label (see labels prefixed w/
`release:`). These labels dictate how your PR will
show up in the autogenerated release notes.
---------
Co-authored-by: Matias Bordese <mbordese@gmail.com>
Co-authored-by: Dominik <dominik.broj@grafana.com>
# What this PR does
- removes unused "custom button" backend code now that we've migrated to
outgoing webhooks
- adds new e2e test for webhooks asserting that an `ngrok`/`express`
webhook handler receives the call as expected + payload is as expected
(related to https://github.com/grafana/oncall/issues/2691) - skipped for
now, the test passes locally but fails on GitHub Actions CI, seems to be
networking related
## Checklist
- [x] Unit, integration, and e2e (if applicable) tests updated
- [x] Documentation added (or `pr:no public docs` PR label added if not
required)
---------
Co-authored-by: Michael Derynck <michael.derynck@grafana.com>
# What this PR does
This task does not appear to have been invoked/have any logs associated
within the past month in any of our cloud environments. I'm fairly
certain it is deprecated and can be removed
## Checklist
- [x] Unit, integration, and e2e (if applicable) tests updated
- [x] Documentation added (or `pr:no public docs` PR label added if not
required)
- [x] `CHANGELOG.md` updated (or `pr:no changelog` PR label added if not
required)
