Refactor some methods, classes and specs in
preparation for versioned snippets.

Speed up path generation with build artifacts

Closes #121929

See merge request gitlab-org/gitlab!22257

Fix stack trace highlight for PHP

Closes #121714

See merge request gitlab-org/gitlab!22258

Pick a first alternative language for Sentry stack trace highlight,
when Rouge can't decide which lexer to choose.

`StackTraceHighlightDecorator` now works with PHP and Hack languages

Previously it would take seconds to render the pipeline index JSON
(/gitlab-org/gitlab/pipelines.json) in the GitLab project. Apparently,
we render over 5000 paths for `BuildArtifactEntity`, and generation of
these paths dominated the request time.

The Rails path helpers are slow because they check the namespace and
project parameters against large regular expressions, which include
`TOP_LEVEL_ROUTES` and `PROJECT_WILDCARD_ROUTES`, respectively.

We can speed this up by generating the paths directly with
strings. While this isn't ideal, this results in a 10x improvement in
speed:

```
Calculating -------------------------------------
                orig    86.000  i/100ms
                 new     1.272k i/100ms
-------------------------------------------------
                orig      1.343k (±13.8%) i/s -      6.536k
                 new     13.756k (±15.3%) i/s -     67.416k

Comparison:
                 new:    13756.3 i/s
                orig:     1343.3 i/s - 10.24x slower
```

To prevent these helper methods from breaking if the routes ever change,
we add tests to ensure that the results are the same.

Closes https://gitlab.com/gitlab-org/gitlab/issues/121929

Surface language and urgency information on error detail page

See merge request gitlab-org/gitlab!22122

Added related badges under issue title

Eliminate N+1 queries in PipelinesController#index

Closes #118427

See merge request gitlab-org/gitlab!22189

Don't run migration tests in unit test jobs

Closes #121602

See merge request gitlab-org/gitlab!22218

https://gitlab.com/gitlab-org/gitlab/merge_requests/20615 introduced a
performance regression: each failed build would generate additional SQL
queries, since they would be rendered by JobEntity. This commit fixes
that by preloading failed builds among other items and adds an N+1 query
test. This adds 4 additional queries per pipeline:

1. user
2. latest_statuses_ordered_by_stage
3. failed_builds
4. failed_builds metadata

Closes https://gitlab.com/gitlab-org/gitlab/issues/118427

Add approximate duration function

See merge request gitlab-org/gitlab!21803

Based on the distance_of_time_in_words function
from rails to convert a time in seconds to an
approximate time.

Update asciidoctor-plantuml 0.0.9 -> 0.0.10

See merge request gitlab-org/gitlab!22205

Ci resource group status transition (v2)

See merge request gitlab-org/gitlab!21899

Move gitlab:assets-compile to prepare

See merge request gitlab-org/gitlab!22202

Remove unused Gitlab::Git.committer_hash

See merge request gitlab-org/gitlab!22215

Sidebar getting partially hidden behind the content block

See merge request gitlab-org/gitlab!21978

Add doc about license compliance

Closes #14733

See merge request gitlab-org/gitlab!21594

Merge the separate doc about the license list into
the main License Compliance docs.

Resolve "Slightly misleading tool tip"

Closes #39491

See merge request gitlab-org/gitlab!22222

Adjust codeowners so it shows the docs team

See merge request gitlab-org/gitlab!22210

Update Usage Ping information with flow diagrams

See merge request gitlab-org/gitlab!21960

Copy repository route under - scope

See merge request gitlab-org/gitlab!22092

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Merge branch '25250-can-t-use-quick-action-to-set-milestone-when-the-project-only-has-milestones-from-parent-group' into 'master'

Fix milestone quick action for ancestor group milestones

See merge request gitlab-org/gitlab!22231

Add back Gitaly feature flag for cache invalidation

See merge request gitlab-org/gitlab!22106

Part of https://gitlab.com/gitlab-org/gitaly/issues/2292

Related to https://gitlab.com/gitlab-org/gitaly/issues/2288

This change is essentially a revert of
https://gitlab.com/gitlab-org/gitlab/merge_requests/18766. Due to an
issue found in production (see
https://gitlab.com/gitlab-com/gl-infra/production/issues/1501#note_262058610),
the cache invalidator needs to be disabled until the cache walker is
able to remove empty directories. This feature flag will allow us to
reenable the cache invalidator when we are ready to test the updated
cache walker.

Improve specs by defining anonymous instead of named classes

Closes #119104

See merge request gitlab-org/gitlab!22094

Update comments, specify new path to spec

See merge request gitlab-org/gitlab!22223

Decorate rich_text with word-diff highlights

See merge request gitlab-org/gitlab!22182

Document `CI_MERGE_REQUEST_EVENT_TYPE`

Closes #37482

See merge request gitlab-org/gitlab!22145

Add changes to default behaviour in docs

See merge request gitlab-org/gitlab!21975

docs - Added myself (Jan Urbanec) as czech proofreader.

See merge request gitlab-org/gitlab!21906

Handles ancestor group milestones by passing in the ancestor group ids
to MilestonesFinder

Show sample metrics for an environment without prometheus

Closes #36255

See merge request gitlab-org/gitlab!22133