Merge branch 'normalize_emoji_aliases_paths' into 'master'
Fix not normalized emoji paths
## What does this MR do?
It normalizes emoji names in `api` and `toggle_award`
## Are there points in the code the reviewer needs to double check?
## Why was this MR needed?
User was able to store +1 and thumbsup to databse, causing UI inconsistency.
## What are the relevant issue numbers?
Fixes #19104
## Screenshots (if relevant)
## Does this MR meet the acceptance criteria?
- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- [ ] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [x] API support added
- Tests
- [x] Added for this feature/bug
- [x] All builds are passing
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)
See merge request !5060
