Removes the duplicated search icon in emoji menu

Closes #30416 and #30016

See merge request !10472

Render PDFs in GitLab

See merge request !10419

Document how ETag caching middleware handles query parameters

See merge request !10482

Use NamespaceValidator::WILDCARD_ROUTES in ETag caching middleware

See merge request !10478

Potential fix for intermittent spec failure in award emoji specs

Closes #30399

See merge request !10476

Load a preview of Sketch 43 files

See merge request !10470

Make group skip validation in the frontend

Closes #29236

See merge request !10426

NamespaceValidator::WILDCARD_ROUTES is less restrictive than
ProjectPathValidator::RESERVED and we really have to avoid only
routes that contain wildcard names.

MR empty state

Closes #20854 and #20841

See merge request !7342

Return an empty array when dependencies is an empty array

Closes #30316 and gitlab-ci-multi-runner#2284

See merge request !10359

Added mock deployment and monitoring service with environments fixtures

See merge request !10379

Hover and then click seems to make this work more reliably.

Closes #30399

Sketch 43 files are technically a zip file, so the JavaScript opens the
zip file & locates a preview.png which is just a quick preview of the
last sketch page edited. After that is loaded it simply places the image
into the DOM

Issue boards list template in JS file

See merge request !9958

Create subgroups if they don't exist while importing projects

See merge request !10406

The search emojis title had the same class as the search input which
caused a duplicated icon.

Closes #30416

This is one step closer to making the transition to .vue files for issue boards

Fix wiki commit message

Closes #20389

See merge request !10464

Do not set closed_at to nil when issue is reopened

See merge request !10453

Handle SSH keys that have multiple spaces between each marker

See merge request !10466

[ci skip]

Notice what happens when a user adds a key with a space in between:

```
irb(main):004:0> 'ssh-rsa  foobar'.split(/ /)
=> ["ssh-rsa", "", "foobar"]
```

This would cause gitlab-shell to receive a blank argument for the actual
key, leading to users unable to login.