With this, we'll emit 2 new counters from web processes that can be
used to monitor apdex.

The `gitlab_sli:rails_request_apdex:total` counter is incremented for
every successful (not a 500) that is not to a health endpoint.

The `gitlab_sli:rails_request_apdex:success_total` is incremented when
the request took less than 1 second. We intend to customize this value
per endpoint in the future.

Both these counters are labelled with `feature_category` and
`endpoint_id` from the context.

The metrics would also be initialized on the first scrape. This means
that a 0 would be available for every set of labels, avoiding bugs in
calculations with these metrics.

To get to all of the `feature_category`s and `endpoint_id`s for the
initialization, we had to move some code that iterates all endpoints
that was only used in tests to the application.

We know this would initialize about 2 * 2500 metrics per pod
running a web server. So we'd like to roll this out in a controlled
fashion, to make sure this doesn't impact our monitoring. Which is why
this is feature flagged.

This also limits the initialization of these metrics to just
web-processes. So they don't get generated for consoles or runner
processes.

This also includes a developer-api to define SLIs and encourages
initializing them with the known label sets.

Spelling fixes

See merge request gitlab-org/gitlab!70492

Create Rubocop rule when enabling LB for idempotnent jobs

See merge request gitlab-org/gitlab!67529

- for idempotent workers that are utilizing load balancing
- add specs to cover all usecases

Refactor nuget to use supported auth tokens

See merge request gitlab-org/gitlab!68272

Fix Elastic::MigrationWorker current_migration (2nd attempt)

See merge request gitlab-org/gitlab!70429

Add DORA DF note in VSA docs

See merge request gitlab-org/gitlab!70387

RuboCop: Increase amount of files in cache

See merge request gitlab-org/gitlab!70487

Fix minor typo

See merge request gitlab-org/gitlab!70469

Decouple project runners queuing query from projects table

See merge request gitlab-org/gitlab!70415

Convert pngquant tasks into shell script, support file arguments

See merge request gitlab-org/gitlab!69987

Switch to v-safe-html in system_note.vue

See merge request gitlab-org/gitlab!70236

Add usage ping feature metric

See merge request gitlab-org/gitlab!70332

First run for Snowplow Vue event dictionary entries (shorter filenames)

See merge request gitlab-org/gitlab!70450

Add connectivity status to Kubernetes Agents listing

See merge request gitlab-org/gitlab!69345

Merge branch '337546-show-better-error-message-when-user-tries-to-assign-a-confidential-epic-to-non-confidential' into 'master'

Return a readable error message for epic assignment failure

See merge request gitlab-org/gitlab!70059

Merge branch '339292-improve-accessibility-of-app-assets-javascripts-vue_shared-components-settings' into 'master'

Clean up `settings_block.vue`

See merge request gitlab-org/gitlab!68921

Update json gem to v2.5.1

See merge request gitlab-org/gitlab!70396

Persist projects configured to use an Agent

See merge request gitlab-org/gitlab!67295

Add feature flag for controlling the decoupling rollout

Changelog: added

Add note about rules being enclosed in double quotes

See merge request gitlab-org/gitlab!70237

Update board list settings drawer style

See merge request gitlab-org/gitlab!69946

Add scopes for pending builds tags

See merge request gitlab-org/gitlab!70214

QA: Export pipeline_url with test stats

See merge request gitlab-org/gitlab!70478

Currently, we need to inspect more files that fit into RuboCop's cache:

  $ bundle exec rubocop --list-target-files | wc -l
  25188

Let's adjust RuboCop's configuration accordingly.

Refactor namespace owner validation logic

See merge request gitlab-org/gitlab!69201

Update deprecation yamls and generate doc

See merge request gitlab-org/gitlab!70465

Only user namespaces must have an owner

Changelog: added

Update test file examples in testing_guide/end_to_end/beginners_guide.md

See merge request gitlab-org/gitlab!64464

- Add ProjectNamespace model in Namespaces
- Add foreign key

Changelog: added

Update CODEOWNERS file for GraphQL docs

See merge request gitlab-org/gitlab!70401