Dynamically set db pool size in Puma

Closes #32562

See merge request gitlab-org/gitlab!19286

Before Puma, we had 1 rails process talk to the database
at any given time, which meant a connection pool size of 1
was sufficient to support that model. With Puma and its worker
thread pool, there can now be many threads simultaneously
trying to talk to the database. This change makes sure that
we allow the db pool size to scale along with the maximum
number of worker threads configured.

Make arrow buttons work within search box

See merge request gitlab-org/gitlab!18685

Fixes a bug where hidden.bs.dropdown was manually triggered
but the dropdown was not actually hidden. Triggering the event
caused the event handlers to be unloaded. The events are supposed
to be attached again when the dropdown is opened but in this case
the dropdown is still open.

Resolve "Update expired trial copy"

Closes #34717

See merge request gitlab-org/gitlab!18962

Refactor tree controls into Vue

Closes #34794

See merge request gitlab-org/gitlab!19065

Merge branch '35175-post_deployment_migration-generator-should-use-same-timezone-settings-as-rails-database' into 'master'

Resolve "post_deployment_migration generator should use same timezone settings as rails database migrations"

Closes #35175

See merge request gitlab-org/gitlab!19316

- in order to match rails migration timezone settings

Merge branch '20825-controller-boards-issuescontroller-update-executes-more-than-100-sql-queries' into 'master'

Remove query limit whitelist for Boards::IssuesController#update

Closes #20825

See merge request gitlab-org/gitlab!19307

Fix ref switcher not working on Microsoft Edge

Closes #31373

See merge request gitlab-org/gitlab!19335

Improve support for graceful shutdown on Puma/Unicorn

See merge request gitlab-org/gitlab!19223

Quarantine failing test

See merge request gitlab-org/gitlab!19343

Adds discussion to the optimistic design response

See merge request gitlab-org/gitlab!19297

This prevents a warning from occouring when we upload a design

Microsoft Edge has a bug in FormData.getAll() that returns an undefined
value for each form element that does not match the given key:
https://github.com/jimmywarting/FormData/issues/80

To work around this issue, we just filter out undefined values.

Closes https://gitlab.com/gitlab-org/gitlab/issues/31373

Fix HAML comment being visible in merge modal

Closes #35080

See merge request gitlab-org/gitlab!19224

Move Vulnerabilities API to Vulnerability Findings API

See merge request gitlab-org/gitlab!19029

The /api/v4/project/:id/vulnerabilities is going
to be used for serving the new Vulnerability model
instances for First-class Vulnerabilities feature.
The previous behavior (responding with
Vulnerabilities::Occurrence) is moved to
/api/v4/project/:id/vulnerability_findings path
unconditionally (regardless of the feature flag).
This is a breaking change.

Revert "Merge branch '33601-use-ci-default-branch' into 'master'"

See merge request gitlab-org/gitlab!19334

This reverts merge request !18915

Fix Prometheus duplicate metrics

See merge request gitlab-org/gitlab!19327

- Issue 34887 details prometheus metrics being duplicated once
  with one line having a 0 count and the other having a valid count

- Update lib/gitlab/metrics/requests_rack_middleware.rb to add
  .to_i to the status value.

- Add changelog for
  https://gitlab.com/gitlab-org/gitlab/merge_requests/19327

Quarantine create project with Auto DevOps

See merge request gitlab-org/gitlab!19332

Issue: https://gitlab.com/gitlab-org/gitlab/issues/35156
Needs investigation.

Docs: Providing clarity on registry and S3 communication

See merge request gitlab-org/gitlab!19275

Grafana auth settings frontend for embed integration

See merge request gitlab-org/gitlab!17330

Adds the frontend for Grafana integration settings

Merge branch '12785-more-accessible-epics-and-differentiation-between-groups-subgroups-and-projects-mvc' into 'master'

Update sidebar to differentiate between groups, subgroups, and projects

See merge request gitlab-org/gitlab!19158

Before, the sidebar displayed the text "Overview" when the user was in
a group, subgroup, or project. This meant it was not immediately clear
whether the user was in a group, subgroup, or project page. This commit
fixes this problem.

Migrate approval check popover specs to Jest & VTU

See merge request gitlab-org/gitlab!19263

Clean up karma troublemakers

See merge request gitlab-org/gitlab!19313

Trigger tracking event without user interaction

See merge request gitlab-org/gitlab!19159

Add rollback dialog environment name

See merge request gitlab-org/gitlab!19209

Added the rollback dialog environment name