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