Merge branch '24739-collapsed-build-list-sorting' into 'master'

Sort pipeline graph builds and build groups by name

## What does this MR do?

Sorts builds and build groups by name within pipeline graphs

## Are there points in the code the reviewer needs to double check?

Shouldn't be. This was a one-line change.

## Why was this MR needed?

It can be difficult to find the build you are looking for within a group of similarly-named builds when they are in a seemingly random order.

## Screenshots (if relevant)

### Before:

![Screen_Shot_2016-11-22_at_2.48.11_PM](/uploads/27f3f9a2e29e7f0e5857bfd425b74306/Screen_Shot_2016-11-22_at_2.48.11_PM.png)

### After:

![Screen_Shot_2016-11-22_at_2.47.46_PM](/uploads/2c6ef1446a1de0012d091d6deef0992b/Screen_Shot_2016-11-22_at_2.47.46_PM.png)

## Does this MR meet the acceptance criteria?

- [x] [Changelog entry](https://docs.gitlab.com/ce/development/changelog.html) added
- Tests
  - [ ] All builds are passing
- [x] 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 it does - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?

Closes #24739

See merge request !7681

app/views/projects/commit/_pipeline_stage.html.haml

-- status_groups = statuses.group_by(&:group_name)
+- status_groups = statuses.sort_by(&:name).group_by(&:group_name)
 - status_groups.each do |group_name, grouped_statuses|
   - if grouped_statuses.one?
     - status = grouped_statuses.first

changelogs/unreleased/24739-collapsed-build-list-sorting.yml

+---
+title: Sort builds by name within pipeline graph
+merge_request: 7681
+author: