Jira: Add option to disable issue updates
Currently, every Jira notification sends a request that overwrites user changes to issue fields (title, description, priority, etc).
Losing changes may be unexpected for many Jira users, and this PR adds a receiver config to be able to skip the update request for existing issues without affecting resolve and reopen transitions.
I don't know about the flag DisableFieldUpdates. This feels like something that should be consistent. We should look at how it works for other integrations like Pagerduty and do the same here.
Sure, I can look into that. I'm pretty sure they don't overwrite, so that works too. On the other hand, without a flag, it will be a breaking change for people expecting the current implementation, which propagates changes in the receiver config to existing open issues.
Just tagging this as related/similar to #4621