Create PR revert template #16446
Revert PRs are janitorial actions which do not make sense to follow the PR template.
Typically these are made adhoc using the GitHub UX.
When performing a revert, it is important to note issues being opened and closed by the reversion.
It is also vital to note the PR being reverted.
Adding a short reason for reversion will help people understand a summary of what is going on.
Description of user facing changes
None
Description of development approach
Created a new template to be copy-pasted when performing a revert
