Update release checklist issue template and generator
What does this MR do?
- Updates slightly the release checklist issue template (adding missing steps)
- Adds some auto-detection mechanisms to the issue generator, so all values should be filled automatically (but still with a way to adjust for specific needs).
Why was this MR needed?
Are there points in the code the reviewer needs to double check?
Does this MR meet the acceptance criteria?
Added tests for this feature/bug
In case of conflicts with
master- branch was rebased