test(e2e): add e2e and visual tests for Mission Status (plus a11y)

[ozyx]

Closes #7461

Describe your changes:

• Add e2e and visual test suites for Mission Status
• Add a11y wherever needed
• Enable the ExampleUser to set Mission Status so we can test the feature

All Submissions:

• Have you followed the guidelines in our Contributing document?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• Is this change backwards compatible? For example, developers won't need to change how they are calling the API or how they've extended core plugins such as Tables or Plots.

Author Checklist

• Changes address original issue?
• Tests included and/or updated with changes?
• Has this been smoke tested?
• Have you associated this PR with a type: label? Note: this is not necessarily the same as the original issue.
• Have you associated a milestone with this PR? Note: leave blank if unsure.
• Is this a breaking change to be called out in the release notes?
• Testing instructions included in associated issue OR is this a dependency/testcase change?

Reviewer Checklist

• Changes appear to address issue?
• Reviewer has tested changes by following the provided instructions?
• Changes appear not to be breaking changes?
• Appropriate automated tests included?
• Code style and in-line documentation are appropriate?

[codecov]

Codecov Report

Attention: 4 lines in your changes are missing coverage. Please review.

Comparison is base (eeb8e97) 55.37% compared to head (f060c5e) 52.56%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7462      +/-   ##
==========================================
- Coverage   55.37%   52.56%   -2.81%     
==========================================
  Files         671      671              
  Lines       26930    26938       +8     
  Branches     2614     2614              
==========================================
- Hits        14912    14161     -751     
- Misses      11302    12061     +759     
  Partials      716      716              

Flag	Coverage Δ		*Carryforward flag
e2e-full	48.92% <ø> (+0.01%)	⬆️	Carriedforward from b5911e1
e2e-stable	38.72% <11.11%> (-20.23%)	⬇️
unit	48.47% <69.23%> (+0.10%)	⬆️

*This pull request uses carry forward flags. Click here to find out more.

Files	Coverage Δ
...ns/userIndicator/components/MissionStatusPopup.vue	56.25% <100.00%> (+56.25%)	⬆️
...plugins/userIndicator/components/UserIndicator.vue	27.94% <66.66%> (ø)
example/exampleUser/ExampleUserProvider.js	45.90% <66.66%> (-35.24%)	⬇️

... and 106 files with indirect coverage changes

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update eeb8e97...f060c5e. Read the comment docs.

[scottbell]

Nice tests!

[unlikelyzero]

I'm pretty sure the aria-label isn't necessary as I noted. It would be better to use HTML5