Backport members SCSS changes

See merge request gitlab-org/gitlab-ce!28115

Resolve "Add filtering to project dashboard [FE]"

Closes #56992

See merge request gitlab-org/gitlab-ce!25231

Fix update head pipeline process of Pipelines for merge requests

See merge request gitlab-org/gitlab-ce!28057

Correct repo mirror SSH key generation docs

See merge request gitlab-org/gitlab-ce!27998

Add issue template for refactorings

See merge request gitlab-org/gitlab-ce!27889

CE Add leave link to access_granted email

See merge request gitlab-org/gitlab-ce!27892

(CE Port) New user onboarding (Welcome screen)

See merge request gitlab-org/gitlab-ce!28062

- Add styles for blue popovers
- Add render_if_exists to help menu for "Learn GitLab" menu item

Resolve "Support Prometheus for group-level clusters"

Closes #51963

See merge request gitlab-org/gitlab-ce!27280

[CE] Compute resolver complexity based on items

See merge request gitlab-org/gitlab-ce!28017

If a field is a resolver, its complexity is automatically
increased. By default we add extra points for sort and search
arguments (which will be common for various resolvers).

For specific resolvers we add field-specific complexity, e.g.
for Issues complexity is increased if we filter issues by `labelName`
(because then SQL query is more complex). We may want to tune these
values in future depending on real-life results.

Complexity is also dependent on the number of loaded nodes, but only
if we don't search by specific ID(s). Also added complexity is limited
(by default only twice more than child complexity) - the reason is
that although it's more complex to process more items, the complexity
increase is not linear (there is not so much difference between loading
10, 20 or 100 records from DB).

Fix editing issues and MRs with NULL lock_version

See merge request gitlab-org/gitlab-ce!28145

Upgrade GitLab UI to 3.10.0

See merge request gitlab-org/gitlab-ce!28140

Fix issuables state_id nil when importing projects from GitHub

Closes #57906

See merge request gitlab-org/gitlab-ce!28027

Issues and merge requests imported from GitHub are having state_id
set to null. This fixes the GitHub project importer and schedule
migrations to fix state_id.

Add close_select2 method to select2_helper

See merge request gitlab-org/gitlab-ce!27981

Add Mayra Cabrera to .gitlab/codeowners

See merge request gitlab-org/gitlab-ce!28131

Per the second step of:
https://gitlab.com/gitlab-com/www-gitlab-com/issues/3351

Update dependency @gitlab/svgs to ^1.60.0

See merge request gitlab-org/gitlab-ce!27842

Aligns the play button for stages

Closes #61469

See merge request gitlab-org/gitlab-ce!28124

Support Prometheus for group-level clusters (backend)

See merge request gitlab-org/gitlab-ce!27995

Tweak cluster helper and refactor its specs.

Use class and id syntax for button attributes

Use feature flag variable and shorthand if expression

Use shorthand if expression

Use a classname instead of tag

Simplify common rules

Use size variable

Move flex grow and shrink to utility classes

Extract redused classes

Remove unecessary styles

Un-nest title variable output

Update spec test names

Rename sort_value_most_stars -> sort_value_stars_desc

Rename sorted_by_stars -> sorted_by_stars_desc

Renname sort_value_most_stars_asc -> sort_value_stars_asc

Invert feature check, assign feature condition to a variable

Inline conditional nav bar rendering

Invert conditional label

Added follow up task

Fix filters returning 0 projects show the wrong view

Move click action out of test expectation

Use proper variable name for project in before block

Rename projects_sort_admin_options_hash

Renamed projects_sort_admin_options_has to
old_projects_sort_options_hash as its not only used
on the admin screen

Fix extra whitespace errors

Stub project_list_filter_bar in the projects_helper specs

Added follow up task for `show_projects?`

Removed url test expectations

Externalize strings

Simplify locals passed through views

Ensure we can still filter when logged out

Cleanup conditional rendering for explore filters

Add tests to ensure search only executes with a button click or enter,
sort by Name, Last updated, Created date and Stars and tests for
Visibility filter

The changes introduced for the project filter bar should
not apply to the admin projects screen.

Remove "Owned by me", "Owned by anyone" options

Update the dropdown option Last created -> Created date.
Introduces fixes for spacing and minor styling across breakpoints.

Updated translations

Adds sort direction dropdown

Allows the project list sorting direction to be changed,
available options can be sorted ascending or descending.
Implements the changes from the UX review.

Added project_list_filter_bar feature flag

Move the build-qa-image to the test stage

See merge request gitlab-org/gitlab-ce!28122

CE destroy repo mirrors

Closes #54574

See merge request gitlab-org/gitlab-ce!27087

It is important to destroy data related to repo mirrors when they are
disabled.
Use `_destroy` nested attribute instead of `enabled` for push mirrors.
Call `remove_import_data` after saving a project if its pull mirror is
disabled.

CI variables of type file

Closes #46806

See merge request gitlab-org/gitlab-ce!27112

Add env_var and file as supported types for CI variables. Variables of
type file expose to users existing gitlab-runner behaviour - save
variable value into a temp file and set the path to this file in an ENV
var named after the variable key.

Resolves https://gitlab.com/gitlab-org/gitlab-ce/issues/46806.