Merge remote-tracking branch 'origin/23603-add-extra-functionality-for-the-top-right-plus-button' into 23603-add-extra-functionality-for-the-top-right-plus-button

Fixed couple of spinach test

Checks for creating new issue
Styling of .dropdown-bold-header
Fixed Spinach Tests to limit them to the main content area for clicking 'New Project' etc. so that they don't click the dropdown menu

Fixed different issues from discussion
Fixed a Spinach Test which had now 2 New buttons

Fix missing tooltip and ARIA labels for accessibility

Closes #31656

See merge request !11907

Move issuable bulk edit form into a sidebar

Closes #28340

See merge request !11351

Update GitLab Pages to v0.4.3

See merge request !11930

Add info on using self-signed certs with Registry

Closes #18239

See merge request !11938

Add PowerShell to CI variable docs

See merge request !11935

Introduce optimistic locking support via optional parameter last_commit_id on File Update API

See merge request !11694

Allow numeric pages domain

Closes #29271

See merge request !11927

Update explanation of job-level variable override to fit example

See merge request !11923

Introduce an Events API

Closes #14707

See merge request !11755

Responsive environment tables

See merge request !11836

* Meld the following disparate endpoints:
 * `/projects/:id/events`
 * `/events`
 * `/users/:id/events`
+ Add result filtering to the above endpoints:
 * action
 * target_type
 * before and after dates

Previously, `PagesDomain` would not allow a domain such as
123.example.com. With this change, this is now allowed, because
it is a perfectly valid domain.

Fix Projects API spec

Closes #33340

See merge request !11928

Make sketch dynamic and link back to production architecture

See merge request !11617

Remove references to old settings location

Closes #33041

See merge request !11932

Resolve "API: Environment info missed"

Closes #30156

See merge request !11900