Update source installation to use Git from Gitaly

See merge request gitlab-org/gitlab!47613

Currently, there's quite a lot of different places which keep track
about which Git version is required by Gitaly in order to have it
operate correctly. This list is hard to keep current, and naturally
those places have diverged in the path.

To fix this, we're moving towards a single source of truth for the
current Git version, which is going to be Gitaly. To implement this,
Gitaly nowadays provides a "make git" target which automatically builds
a supported configuration of Git and installs it into the desired
location. While not yet done, the vision is that this allows us to
quickly iterate in case there are security vulnerabilities reported or
in case there's a bug in Git which impacts operations.

As a first target, this commit converts our source-based installation
instructions to use this target.

[GraphQL] Metrics: use Global-ID scalar

See merge request gitlab-org/gitlab!36100

Default `vue_issue_header` feature flag to on

See merge request gitlab-org/gitlab!47690

Default `vue_issue_header` feature flag to on to convert the
issue header actions to an ellipsis dropdown menu for
improved UX so the user can go to one spot for all issue actions.

Reject incomplete multibyte strings and other invalid UTF8

See merge request gitlab-org/gitlab!47658

Trying to encode the input to UTF8 before matching would cause errors
when the string includes incomplete multibyte characters or any
characters ruby can't convert to UTF8.

Fix links to design.gitlab.com pages

See merge request gitlab-org/gitlab!47849

Moved template warning below type

See merge request gitlab-org/gitlab!47103

Update Release examples

See merge request gitlab-org/gitlab!47738

Global Search - Left Sidebar 2.0

See merge request gitlab-org/gitlab!47561

This reverts merge request
https://gitlab.com/gitlab-org/gitlab/-/merge_requests/47344

Update Gitaly version

See merge request gitlab-org/gitlab!47815

Apply gl-button class to buttons

See merge request gitlab-org/gitlab!47482

Multiple package pipelines for package history

See merge request gitlab-org/gitlab!44348

Enable zip_pages_deployments by default

See merge request gitlab-org/gitlab!47763

Remove DOMContentLoaded Eventlisteners

See merge request gitlab-org/gitlab!47776

Enable variable expansion in rules:changes

See merge request gitlab-org/gitlab!47783

Enable by default variable expansion for variables in rules:changes

Add CustomEmoji GraphQL API

See merge request gitlab-org/gitlab!37911

Change and update code to match missed files

Implement `deactivated?` for deploy tokens

See merge request gitlab-org/gitlab!47698

`PolicyActor` has a `deactivated?` method that returns
`false`. However a `DeployToken` can indeed be deactivated.

Fix link to Ruby docs

See merge request gitlab-org/gitlab!47834

Fix undismissed scope

See merge request gitlab-org/gitlab!47697

Fix whitespace markdown errors

See merge request gitlab-org/gitlab!47711

Compress remaining uncompressed images, November 2020

See merge request gitlab-org/gitlab!47818

Remove unused doc image, Nov 2020

See merge request gitlab-org/gitlab!47824

Update deploy token package permissions

See merge request gitlab-org/gitlab!47675

Include read_package in deploy token permissions
to allow mvn deploy to work with a write_package_registry
deploy token.

Removing DOMContentLoaded Eventlisteners from
index files since the scripts
are embedded using the defer tag.

Merge branch '214811-add-revoke-buttons-to-the-pat-tab-of-the-credential-inventory-groups' into 'master'

Add Revoke buttons to the PAT tab of the Group credentials inventory

See merge request gitlab-org/gitlab!40742

- Updated revoke_button_available? restriction to check for group
feature flag
- Added new routes for managed groups revoke
- Updated the revoke service to support no token being passed
- Updated the inventory actions to properly render 404
- Added tests