The Gitaly CommitService is being hammered by n + 1 calls, mostly when
finding commits. This leads to this gRPC being turned of on production:
https://gitlab.com/gitlab-org/gitaly/issues/514#note_48991378

Hunting down where it came from, most of them were due to
MergeRequest#show. To prove this, I set a script to request the
MergeRequest#show page 50 times. The GDK was being scraped by
Prometheus, where we have metrics on controller#action and their Gitaly
calls performed. On both occations I've restarted the full GDK so all
caches had to be rebuild.

Current master, 806a68a8, needed 435 requests
After this commit, 154 requests

10.3 CE-to-EE update guide

Closes #10

See merge request gitlab-org/gitlab-ee!3754

EE- new nav tech debt

See merge request gitlab-org/gitlab-ee!3695

Port of 28869-es6-modules to EE

See merge request gitlab-org/gitlab-ee!3715

Fix successful rebase throwing flash error message

Closes #4304

See merge request gitlab-org/gitlab-ee!3727

Update empty state for service desk

See merge request gitlab-org/gitlab-ee!3710

Restructure HA DB docs to provide better flow and checkpoints

See merge request gitlab-org/gitlab-ee!3645

Docs: update admin docs

Closes #4258

See merge request gitlab-org/gitlab-ee!3749

Port of '40285-prometheus-loading-screen-no-longer-seems-to-appear' to EE

See merge request gitlab-org/gitlab-ee!3748

Fix order-dependent spec failure by avoiding monkeypatching

Closes #4312

See merge request gitlab-org/gitlab-ee!3750

Merge branch 'ee-tmlee/gitlab-ce-28004-consider-refactoring-member-view-by-using-presenter' into 'master'

[EE] Refactor member view by using presenter

See merge request gitlab-org/gitlab-ee!3620

Explicit QA Runtime::Browse that handles sessions better / EE

See merge request gitlab-org/gitlab-ee!3704

Use new Geo nodes settings pages in Gitlab QA

Closes #4306

See merge request gitlab-org/gitlab-ee!3733

Clean up new dropdown styles (EE port)

Closes gitlab-ce#39142 and gitlab-ce#39446

See merge request gitlab-org/gitlab-ee!3698

move new epic dropdown to ee namespace

See merge request gitlab-org/gitlab-ee!3721

Signed-off-by: Rémy Coutable <remy@rymai.me>

Fix an exception in Geo scheduler workers

Closes #4309

See merge request gitlab-org/gitlab-ee!3740

Resolve "Geo: cache results in issue and message count being incorrect"

Closes #4070

See merge request gitlab-org/gitlab-ee!3639

Docs: Explicitly mention which EE version contains different push rules

Closes #4196

See merge request gitlab-org/gitlab-ee!3636

Fix Geo specs failing due to "lock out" validation errors

Closes #4303

See merge request gitlab-org/gitlab-ee!3726

Replace license_admin_area.png to show new UI

See merge request gitlab-org/gitlab-ee!3735

Update license admin area images and instructions

See merge request gitlab-org/gitlab-ee!3737

Replace admin_wrench.png to match new UI

See merge request gitlab-org/gitlab-ee!3734

* master: (260 commits)
  Add js prefix for issuable-edit (EE Version)
  move .project-mirror-settings to ee namepsace
  Remove the use of plans table from deletion strategy
  Use deletion truncation strategy since it's faster on CI
  Optimize Geo specs by using truncation strategy for DB cleaner only when necessary
  Fix comment on image discussion icon alignment
  Remove the unused, EE-only mv_storage gitlab_projects command
  Containing epic
  move contributor analytics doc to correct location
  Docs: add index for doc/administration/operations/
  Resolve merge conflicts with dev.gitlab.org/master after security release (EE port)
  Update specs to create Plans on-demand
  Remove the Plan seed entirely and add factories to create them on-demand
  Unify mirror addition operations to prepare for Gitaly migration
  Add feature flag to use gitaly-ssh mirroring when cloning internal repos
  fixed import
  updated imports
  Resolve wrong conflict resolution in spec/features/projects/clusters_spec.rb
  Resolve conflicts in app/models/user.rb
  Manually add 10.2.4 changelog entries
  ...