Improve cleanup of gpg-homedirs

See merge request gitlab-org/gitlab!19311

The `gpg-agent` that could have been spawned here dies when it sees
it's socket disappear.

However, sometimes it seems like we fail to delete the homedir,
causing the `gpg-agent` to live on forever. We've noticed that the
deletion failed in
http://gitlab.com/gitlab-org/gitlab-foss/issues/36998: there was a
race condition during the deletion where `gpg-agent` would still be
modifying files while we've already called `FileUtils.remove_entry`.

This will attempt to delete the directory multiple times, at least 0.1
seconds apart. This is a naive way of trying to make sure
we clean up the homedir and count on `gpg-agent` to see that and make
itself go away.

On a web node we'll attempt for at most 0.5 seconds to clean up the
directory before failing. In a sidekiq process we'll attempt the
deletion for up to 2 seconds.

When the cleanup fails, we will now track that exception in
Sentry to gain some visibility.

This also adds counters for the creation and deletion of tmp
keychains, which we should be able to correlate to the nubmer of
zombie `gpg-agent` processes.

Allow emojis to have links

Closes #24891

See merge request gitlab-org/gitlab!18014

Regenerate graphql schema files

Closes #35462

See merge request gitlab-org/gitlab!19526

Correctly caches log tree calls in Apollo client

See merge request gitlab-org/gitlab!19382

Display the IID of a Feature Flag

See merge request gitlab-org/gitlab!19046

Initialize EKS clusters form for instance and group level clusters

See merge request gitlab-org/gitlab!18690

We are initializing the form to create K8 clusters in three places

- Project level clusters
- Group level clusters
- Instance level clusters

This commit moves duplicated initialization code into a single
fn

Support Read and Delete operations in Feature Flag Scope API

See merge request gitlab-org/gitlab!18200

Docs - Flesh out Praefect documentation

See merge request gitlab-org/gitlab!19418

Docs: fix a typo

See merge request gitlab-org/gitlab!19497

Add a note about feature not being available yet

See merge request gitlab-org/gitlab!19225

- Since the self-monitoring project was not released in the planned
milestone, but the documentation did get released, update the docs now
to note that the feature is not yet available.

Backend: Add checkbox to enable/disable grafana authentication

See merge request gitlab-org/gitlab!19234

In example use "remove_concurrent_index" instead of "remove_index"

See merge request gitlab-org/gitlab!19306

Fix the CI config for the 'review-stop' job

See merge request gitlab-org/gitlab!19459

Merge branch '35337-images-stopped-loading-signed-urls-of-uploads-expire-earlier-than-redirect-cache' into 'master'

Resolve "images stopped loading: signed URLs of uploads expire earlier than redirect cache"

See merge request gitlab-org/gitlab!19494

Expose cycle analytics summary separately

See merge request gitlab-org/gitlab!19229

This change exposes the summary counts for group level cycle analytics
via a separate endpoint while making sure the old CA implementation is
still working.

This allows the flag to be referenced in other portions of the app
(coming soon), such as issues, MRs and epics.

Setting a long-term cache header works fine when not using object
storage, or when using object storage with proxy_download enabled. When
using object storage _without_ proxy_download, we send a redirect that's
cached for six months to a signed URL in object storage, but the signed
URL only works for ten minutes. So once those ten minutes are up, the
browser will keep following the (cached) redirect to a dead link.

In future, we could be more sophisticated by setting the TTL based on
the settings we're using. For now, just set this back to the pre-12.4
state of not caching content for longer than 5 minutes.

Add guard to avoid misleading error message

See merge request gitlab-org/gitlab!19487

Update plantuml.md with URI rewrite for nginx

See merge request gitlab-org/gitlab!19163

Revert "Merge branch 'mc/backstage/needs-canonical-form' into 'master'"

See merge request gitlab-org/gitlab!19479

Update praefect git_data_dirs setup

Closes gitaly#2111

See merge request gitlab-org/gitlab!19040

Add API for suggesting unique alternatives if username exists

See merge request gitlab-org/gitlab!19303

This commit adds public API support for FF scope

This reverts merge request !17539