Rolls out PagerDuty incident integration

Added a feature flag mention to design docs

See merge request gitlab-org/gitlab!37185

Documentation for upgrading chart

See merge request gitlab-org/gitlab!36789

Fixed issue with discussion not linking to in file-by-file

See merge request gitlab-org/gitlab!37104

This commit adds documentation for upgrading chart

Autocomplete confidential only epics & issues

See merge request gitlab-org/gitlab!36687

Merge branch '229155-clarify-checking-ability-to-merge-automatically-message-on-mr-widget' into 'master'

Change loading message for merge widget

Closes #229155

See merge request gitlab-org/gitlab!37181

Add pagination to iterations list

See merge request gitlab-org/gitlab!37052

Basically completely copied from issues list.
Not ideal but simple and better than no pagination

Use memoized start/finish for metrics based on issues table

Closes #224602

See merge request gitlab-org/gitlab!37155

Redis latency monitoring: focus on slower requests

See merge request gitlab-org/gitlab!37098

Removing remaining instances of multiple_clusters

Closes #225837

See merge request gitlab-org/gitlab!35927

Since multiple clusters moving to core, we can remove any remaining
references to has_multiple_clusters, as discussed in the comments of the
parent MR.

Passing `confidential_only=true` as a query param in the
autocomplete endpoints. Enabling the backend to only fetch
confidential epics and confidential issues.

Add Store for Creating a User List

See merge request gitlab-org/gitlab!37005

Update 3k reference architecture

Closes #217852

See merge request gitlab-org/gitlab!34194

Revert "Merge branch '214104-versioning' into 'master'"

See merge request gitlab-org/gitlab!37179

Add missing rate and concurrency limits

See merge request gitlab-org/gitlab!37117

Revert !36944 - Add include_parent_milestones to milestones API

See merge request gitlab-org/gitlab!37177

Add good for 1st time contributors to beginners

See merge request gitlab-org/gitlab!36950

Don't show MLC form on thread replies

Closes #229596

See merge request gitlab-org/gitlab!37139

Support multiple files when editing snippets

See merge request gitlab-org/gitlab!37079

See https://gitlab.com/gitlab-org/gitlab/-/issues/220785#note_378854721 for more details

Docs: Polish "Pages on separate server" setup

Closes gitlab-com/support/support-team-meta#2469

See merge request gitlab-org/gitlab!36282

https://gitlab.com/gitlab-org/gitlab/-/blob/25ad8786b887368f11d3fee97b7724f0195c2254/doc/development/documentation/styleguide.md#placeholder-text

This reverts merge request !36686

- Revert changes that added the param
include_parent_milestones to project milestones

Make note about trigger hover behavior

See merge request gitlab-org/gitlab!37176

Use native Gitaly pagination for Branch list API

See merge request gitlab-org/gitlab!35819

Pagination by Kaminari is slow because it requests all branches and
paginate after receiving results from Gitaly. It's a first iteration to
implement native pagination with Gitaly.