Adds a ratelimit for AmazonSNS.
AlertChannelDefining mixin is now injecting alert_receive_channel only
in request, not in kwargs to not to break AmazonSNS.
# What this PR does
https://www.loom.com/share/18cc445117de4895a10892d56c7d3699
In preparation to upgrade our cloud databases, this PR makes some minor
changes which, after testing locally, allowed the `POST
/<integration_type>/<alert_channel_key>` endpoints to successfully
receive incoming alerts and queue the celery tasks.
I've tested all of the defined `POST
/integrations/v1/<integration_type>/<alert_channel_key>` endpoints by
sending `POST` requests to an integrations' URL while the MySQL database
was down, bringing the database back up, and ensuring the alerts were
created.
## Some other findings
- the integration heartbeat endpoints will not work as we interact w/
the database to persist the incoming heartbeat instance
- if the integration was created in the last 180 seconds, incoming
alerts will fail due to the way we cache the integration IDs
([code](https://github.com/grafana/oncall/blob/dev/engine/apps/integrations/mixins/alert_channel_defining_mixin.py#L47-L50))
- The `create_alert` celery task is set to `max_retries=None` and
`retry_backoff=True`. This means that the queued tasks will continue
retrying forever w/ an exponential backoff, until the alerts can be
created in the database (ie. when the database is back online).
## Checklist
- [ ] Unit, integration, and e2e (if applicable) tests updated (N/A)
- [ ] Documentation added (or `pr:no public docs` PR label added if not
required) (N/A)
- [ ] `CHANGELOG.md` updated (or `pr:no changelog` PR label added if not
required) (N/A)
# What this PR does
When an organization is migrated to a different cluster it has it's
`migration_destination_slug` set for redirection purposes but it also
needs to be deleted so scheduled tasks for it do not run in the old
cluster. By changing the order so moved has precedence over deleted API
calls will be correctly redirected for moved organizations while the
organization is still considered deleted to suppress tasks that are no
longer needed in the old cluster.
## Which issue(s) this PR fixes
## Checklist
- [ ] Tests updated
- [ ] Documentation added
- [ ] `CHANGELOG.md` updated
# What this PR does
It introduces soft-delete of organization, since grafana stacks are
soft-deleted too. Also, we had a problem with deleting orgs with large
amounts of alerts, so soft-deletion will fix this problem. I think, that
problem of cleaning alerts of deleted orgs should be solved as a part of
alert retention
