Eliminate N+1 queries in /api/groups/:id

Closes #49845

See merge request gitlab-org/gitlab-ce!24513

Revert "Merge branch 'qa-use-mr-iid-in-review-app-slug' into 'master'"

See merge request gitlab-org/gitlab-ce!24521

Search project tags via API

Closes #54401

See merge request gitlab-org/gitlab-ce!24385

This reverts merge request
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/24388

Set ActionController raise_on_unfiltered_parameters to true

See merge request gitlab-org/gitlab-ce!24443

Bump the katex package to 0.10.0

See merge request gitlab-org/gitlab-ce!24478

add a note that GIT_STRATEGY is not supported for k8s executor

See merge request gitlab-org/gitlab-ce!23974

In https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/15475/diffs, a
significant amount of work went into eliminating N+1 queries in the
/api/groups/:id/projects endpoint. We can reuse the
`Entities::Project.prepare_relation` call on the projects.

In a group with 2,573 projects on GitLab.com, this change significantly
improves performance:

* 18019 SQL queries down to 21
* Time spent in DB: 70 s down to 384 ms

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/49845

Resolve "Remove `error_tracking` feature flag"

Closes #56213

See merge request gitlab-org/gitlab-ce!24306

Remove unwanted margin above suggested changes.

Closes #56389

See merge request gitlab-org/gitlab-ce!24419

Improvements for spec migration readme

See merge request gitlab-org/gitlab-ce!24440

Refer to https://github.com/KaTeX/KaTeX/pull/1700 for additional details.

Update vuex.md - swap PUT/POST methods

See merge request gitlab-org/gitlab-ce!24494

Fix Resource attribute bug

See merge request gitlab-org/gitlab-ce!24407

Update reference to ~Monitoring to be ~Monitor

See merge request gitlab-org/gitlab-ce!24489

Correct minimum yarn version in 11.6 -> 11.7 upgrade doc

Closes #56254

See merge request gitlab-org/gitlab-ce!24495

Cleanup stale +deleted repo paths on project removal (adjusts project removal bug)

Closes #46146

See merge request gitlab-org/gitlab-ce!24269

View epic permissions

See merge request gitlab-org/gitlab-ce!24483

Return the maximum group access level in the projects API

Closes #43684

See merge request gitlab-org/gitlab-ce!24403

1. When removing projects, we can end-up leaving the +deleted
repo path dirty and not successfully removing the non-deleted
namespace (mv process is not atomic and can be killed without
fully moving the path).

2. In order to solve that, we're adding a clean-up phase on
ensure which will schedule possible staled +deleted path deletion.
Note that we don't check the current state (if there is or not a
repo) in order to schedule the deletion. That's intentional
in order to leverage Gitlab::GitalyClient::NamespaceService#remove
idempotency and ensure consistency.

Add documentation for new NGINX Ingress metrics

Closes #56473

See merge request gitlab-org/gitlab-ce!24449

[EE Backport] Add notes filters for epics

See merge request gitlab-org/gitlab-ce!24372

Add flat-square badge style

Closes #30120

See merge request gitlab-org/gitlab-ce!24172

Use MR IID in Review Apps slug and domain

See merge request gitlab-org/gitlab-ce!24388

Merge branch '56328-frequent-items-initialisations-can-be-optimised-and-deferred-in-idlecallback' into 'master'

Resolve "Frequent Items Initialisations can be optimised and deferred in idleCallback"

Closes #56328

See merge request gitlab-org/gitlab-ce!24401

Avoid overwriting default jaeger values with nil

See merge request gitlab-org/gitlab-ce!24482

Fix runner eternal loop when update job result

Closes #56518

See merge request gitlab-org/gitlab-ce!24481

Collapses directory structure in merge request tree

Closes #53069

See merge request gitlab-org/gitlab-ce!24392

During the review process for adding opentracing factories, a bug was
introduced which caused Jaeger to initialize an invalid tracer. The
bug was due to use sending nil through as a kwarg when the Jaeger
initializer used a non-nil default value.

This is fairly insidious as, the tracer looks like a tracer, but, when
methods are invoked, it throws `NoMethodError` errors. To ensure that
this issue does not happen in future, the tests have been changed to
ensure that the tracer works as expected. This could avoid problems
in future when upgrading to newer versions of Jaeger.

Add spec

Add changelog

Bump rbtrace version to 0.4.11

See merge request gitlab-org/gitlab-ce!24476