Bring buttons up to design spec

Closes #61146, #61144, and #61145

See merge request gitlab-org/gitlab-ce!28545

This is a CSS effort only.

Fixes the padding of the buttons to be `8px 12px`
(including border) so that the button height is
32px.

Also adjusts the border width for all buttons when
the state is `hover`, `focus`, or `active to be 2px
thick instead of 1px thick. This is accomplished
through an inset box-shadow as not to increase
the size of the button.

Fixes some colors for primary and tertiary buttons.

Crosslink Prometheus and Grafana to HA monitoring

Closes #63419

See merge request gitlab-org/gitlab-ce!30588

Update doc/ci/yaml/README.md

Closes #58636

See merge request gitlab-org/gitlab-ce!30516

Review Tools: Add large z-index to toolbar

See merge request gitlab-org/gitlab-ce!30583

Update doc/user/project/merge_requests/index.md

See merge request gitlab-org/gitlab-ce!30517

CE Port: Fix race condition on merge train with better exclusive lock

See merge request gitlab-org/gitlab-ce!30352

Banzai - avoid redis if attr is in DB cache

See merge request gitlab-org/gitlab-ce!30334

Project list: Add text-secondary to controls container

See merge request gitlab-org/gitlab-ce!30567

- Add changelog entry

Align CI icon in merge request dashboard

Closes #64314

See merge request gitlab-org/gitlab-ce!30558

Improve Graphql Docs

Closes #57694

See merge request gitlab-org/gitlab-ce!29998

Adds more friendly docs for GraphQl implementation

Fetch users from Phabricator + link to issues

Closes #60565

See merge request gitlab-org/gitlab-ce!30321

Efficient merge train locks with Sequential Process helper.

Fixed back navigation for projects filter

Closes #62088

See merge request gitlab-org/gitlab-ce!30373

When cache_collection_render runs we end up reading and writing
things to redis even if we already have the rendered field cached
in the DB. This commit avoids using redis at all whenever we have
the field already rendered in the DB cache.

Update qa/README.md GDK port

See merge request gitlab-org/gitlab-ce!30596

Upgrade rspec-rails to 3.8.2 and dependencies

See merge request gitlab-org/gitlab-ce!28378

Fix basic login test stability

Closes gitlab-org/quality/staging#57

See merge request gitlab-org/gitlab-ce!30446

Support additional panel types

Closes #60008

See merge request gitlab-org/gitlab-ce!30001

This introduces the single stat chart component aside from
the area chart component

Fix `simple_format` undefined error #60179

Closes #60179

See merge request gitlab-org/gitlab-ce!30366

Adds a Rubocop cop for Rails.logger

Closes #54102

See merge request gitlab-org/gitlab-ce!30415

Suggests to use a JSON structured log instead

Related to https://gitlab.com/gitlab-org/gitlab-ce/issues/54102

Fix whitespace in many administration docs (part 2)

See merge request gitlab-org/gitlab-ce!30555

Many code blocks are 4spaced, and they render in GitLab
without coloring as a result, even though they are
fenced with a language label. If in a list, other items
will render as being in a code block too, even if not
meant to. This fixes all these issues for many admin
docs (part 2)

Edit GraphQL general availability text

See merge request gitlab-org/gitlab-ce!30541

Moving Pgbouncer HA documentation out of database documentation

Closes #63540

See merge request gitlab-org/gitlab-ce!30471

Improve performance of fetching environments statuses

Closes #62589

See merge request gitlab-org/gitlab-ce!30560

This brings the rspec-core version in line with the Gitaly changes
and introduces Rails 5.1/5.2 improvements.

Full CHANGELOG:
https://github.com/rspec/rspec-rails/blob/master/Changelog.md

Vulnerabilities API now supports pipeline_id

See merge request gitlab-org/gitlab-ce!30086

Remove deleteNote from notes service

See merge request gitlab-org/gitlab-ce!30537

Add docs on project-based dashboard config

See merge request gitlab-org/gitlab-ce!28154