Smarter markdown templates for issues, merge request, comments
### Problem
Templates for issue descriptions and merge request descriptions often contain huge HTML comment blocks with useful information. These can make it hard to read and know the correct way to fill out the template.
Ideally the comment blocks should be replaced with real content.
This would also be helpful if we have templates for comments on issues and merge requests, to make it easier for sales people to provide the correct information in a comment when requesting a feature
### Proposal
???
epic