Merge branch '22774-retouch-environments-deployments' into 'master'

Resolve "Retouch environments list and deployments list"

## What does this MR do?
#### Environments List
- Fixes deployment ID
- Removes bold styling from deployment ID
- Changes Las Deployment Column to have '#ID by user'
- Adds build column with link to the build
- Adds external url to where the environment is hosted

#### Environment Details
- Add link to the build column and changes content to show "build (#id) by user"
- Adds external link to the review app

Adds tests

## Screenshots (if relevant)
#### Environments List
![env_list](/uploads/6cfd737bb0d2f2853a610479877de5a3/env_list.png)
#### Environments Details
![env_details](/uploads/70ec59d7d7de5c1ef57132c2ec9c1b8f/env_details.png)

## 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)
- [ ] API support added
- Tests
  - [x] Added for this feature/bug
  - [ ] All builds are passing
- [ ] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [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)
- [ ] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?
Closes #22774

See merge request !6691

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