Bump Gitaly to 0.98.0

See merge request gitlab-org/gitlab-ce!18740

Various improvements to repository checks

See merge request gitlab-org/gitlab-ce!18484

Hooks were run for wikis, but given the internal API wasn't responding
failures happended, as seen on:
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/18693

Live trace: Use efficient destroy all (for `dependent: :destory` problem)

See merge request gitlab-org/gitlab-ce!18575

New CI Job live-trace architecture (v2)

Closes #44935

See merge request gitlab-org/gitlab-ce!18169

Only run session related Warden hooks for user scope

Closes gitlab-ee#5857

See merge request gitlab-org/gitlab-ce!18771

Resolve "Vuex actions - How to achieve a better state management"

Closes #44427

See merge request gitlab-org/gitlab-ce!17929

Resolve "Improve Web IDE left panel and modes"

Closes #44846

See merge request gitlab-org/gitlab-ce!18581

Upgrade underscore.js

See merge request gitlab-org/gitlab-ce!18578

Enable prometheus metrics by default

Closes #43660

See merge request gitlab-org/gitlab-ce!18723

Add signature verification badge to compare view

See merge request gitlab-org/gitlab-ce!18245

Resolve "CI retry/cancel job or pipeline redirect the user and can't be open in a new tab"

Closes #33697

See merge request gitlab-org/gitlab-ce!18451

Backport CE changes from "autocomplete usernames in Epic comments/description"

See merge request gitlab-org/gitlab-ce!18605

Remove top margin on the terms page with performance bar

Closes #46064

See merge request gitlab-org/gitlab-ce!18752

For easier overriding methods.

No idea where it used to be, but I can no longer find it.

A repo does not need pushes before it will be repo-checked. There are
other sources where commits can come from (e.g. import or webIDE).

In the test I made the method of breaking a repo more robust. And
added a few test examples.

See also gitlab-org/gitlab-ce#45046.