Add rubocop-gitlab-security gem

See merge request !2558

[EE] Incorporate Gitaly's CommitService.FindCommit RPC

See merge request !2532

Spread load across all nodes in an elasticsearch cluster

Closes #2911

See merge request !2625

This helps keep the abstraction layers simpler, and also keep the
interface of those methods consistent, in case of implementation
changes.

[EE] Resolve "Store MergeWorker JID on merge request, and clean up stuck merges"

See merge request !2621

EE patch branch for compact check for 33874_confi

See merge request !2618

EE-Port: Circuitbreaker for storage paths

Closes gitlab-com/infrastructure#1946

See merge request !2617

Resolve "Pull repository mirroring: Support for SSH keys"

Closes #98

See merge request !2551

Refactor omniauth controller code

See merge request !2619

EE Port of: Store & use ConvDev percentages returned by Version app

See merge request !2614

[EE] Support group milestone references

See merge request !2612

The raw_log method is meant to become the Gitaly RPC boundary. By
setting the defaults before doing the RPC we keep the RPC
implementation simpler. We also sidestep the unfortunate subtleties of
what happens when options[:limit] is not set, or nil.

reverse the conditions in `auditor?`

See merge request !2620

Closes #32207, #33117, gitlab-com/infrastructure#1946, and gitlab-com/infrastructure#1775

See merge request !11449

EE Port of Resolve "Remove jQuery Nicescroll"

See merge request !2608

Audit failed login events

See merge request !2587

Reset only migration models

See merge request !2611

We had a lot of copied and pasted code, when the different elements were very
small and easy to get wrong.