This increases supported browser versions to:

- Google Chrome/Chromium: at least major version 84 because older
  versions have an annoying bug with Array.reduce:
  https://bugs.chromium.org/p/chromium/issues/detail?id=1049982
- Microsoft Edge: at least majoy version 84 (dropping support for
  pre-Chromium Edge). (Same reasoning as with Chrome)
- Mozilla Firefox: at least major version 78, as this is the latest ESR
  and it is used quite a lot.
- Apple Safari: at least major version 13 (dropping support for
  Safari 12) because it is the second latest version of Safari

Changelog: changed

Given that we use `@babel/preset-env` transpiled files contain imports
to `core-js` at the top of the file. `babel-loader` caches those
transpiled files. If we bump the supported browser versions in
`.browserslistrc`, we might need less imports of `corejs` modules. But
as they are cached, we will retrieve those outdated files with the wrong
imports causing unneccessary `core-js` modules to be imported.

If we are adjusting browser versions, we want a full pipeline to see the
effects (e.g. bundle size changes, etc.). Furthermore Danger should know
about the browserslist file.

Removing the sidebar_refactor FF in the frontend

See merge request gitlab-org/gitlab!64324

Bring redesigned security-configuration page to EE

See merge request gitlab-org/gitlab!65171

Update admin settings text for localization preferences

See merge request gitlab-org/gitlab!65407

Update Gitaly version

See merge request gitlab-org/gitlab!65533

Refactor health status to use apollo

See merge request gitlab-org/gitlab!64983

Add Coverage fuzzing to DevopsAdoption API

See merge request gitlab-org/gitlab!65253

Note that upgrade to latest minor version is required before major

See merge request gitlab-org/gitlab!64865

Update Gitaly version

See merge request gitlab-org/gitlab!65529

Return 0 for projectCount when no associated projects are found

See merge request gitlab-org/gitlab!65252

Reflect 'project_services' -> 'integrations' namespace change

See merge request gitlab-org/gitlab!65372

Avoid cache misses: Use Sidekiq.dump_json to serialize arguments

See merge request gitlab-org/gitlab!65482

Fix uninitialized constant Audit::UpdateService

See merge request gitlab-org/gitlab!65519

Initialize conversion of ci_builds_metadata.id for bigint migration

See merge request gitlab-org/gitlab!65477

Improve database migration guide

See merge request gitlab-org/gitlab!59721

Remove project_statistics_sync feature flag

See merge request gitlab-org/gitlab!65435

Fix uninitialized constant in update protected branch

See merge request gitlab-org/gitlab!65270

Ignore googlefont stylesheet from premailer

See merge request gitlab-org/gitlab!65509

Fix misleading upgrade CTA in Jira configuration

See merge request gitlab-org/gitlab!65302

Changelog: changed

Restrict visibility of group-level DORA charts to Ultimate users

See merge request gitlab-org/gitlab!65478

This commit fixed a bug that allowed the DORA charts to render even if
the DORA feature wasn't available.

Changelog: fixed
EE: true

Update to use correct push code permission

See merge request gitlab-org/gitlab!65090

Add new security job artifact report cluster image scanning

See merge request gitlab-org/gitlab!64611

This change fixes the uninitialized constant exception
when a protected branch is updated while creating security
policy project.

Make Subscription Activation Banner dismissible

See merge request gitlab-org/gitlab!64618

chore: Update security parser specs with programmatic UUID generation

See merge request gitlab-org/gitlab!65194

- Use full path when referring to Audit::Update service

Changelog: fixed
MR: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/65519
EE: true