Groups reports in MR view and splits reports in CI view

What does this MR do?

1. Groups reports in MR view
2. Splits reports in CI view
3. Updates texts

Note: There ins't an easy way to test this locally.

Apply these diffs:

1. For errors: error.diff
2. For loading: loading.diff
3. For success: success.diff
4. For no base: nobase.diff

Screenshots (if relevant)

Note: The copy in the screenshots in not up to date. Check the code with the copy instead

CI View

Scroll: https://cl.ly/2A3s1f253U2O

MR widget

Error

Loading

All states

Success with vulnerabilities

Success without vulnerabilities

No base

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• API support added
• Tests added for this feature/bug
• Review
  • Has been reviewed by UX
  • Has been reviewed by Frontend
  • Has been reviewed by Backend
  • Has been reviewed by Database
• Conform by the merge request performance guides
• Conform by the style guides
• Squashed related commits together
• Internationalization required/considered
• If paid feature, have we considered GitLab.com plan and how it works for groups and is there a design for promoting it to users who aren't on the correct plan
• End-to-end tests pass (package-qa manual pipeline job)

What are the relevant issue numbers?

Closes #4310 (closed) Closes https://gitlab.com/gitlab-org/gitlab-ee/issues/5105 Closes https://gitlab.com/gitlab-org/gitlab-ee/issues/4464 Closes https://gitlab.com/gitlab-org/gitlab-ee/issues/5129