Solve for high cold cache times using a lookback window in
the StuckCiJobsWorker.

This ensures that jobs (and pipelines) have a `queued_duration` field,
wherever they are used (webhooks, REST API, GraphQL).

This will help us to track possible dramatic failure changes
when we deploy new features / bug fixes.

This reverts merge request !57232

It was wrongly trying to update all statuses

Adds position-prioritized matching for paralellization
suffixes in Ci::Build#group_name

This commit moves the resource group implementation
to the super class.

When retrying builds or pipelines, all subsequent build will get
associated to the user which triggered the retry.

* Removes conditional feature flag code from specs
* Updates the docs to remove mention of feature flag
* Removes code from CommitStatus model
* Removes yml file with feature flag info

feature flag: one_dimensional_matrix

This is the third iteration of removing legacy pipeline processing.
This commit removes removes ci_composite_status and cleans rest.

This is the first iteration of removing legacy pipeline processing.
With this, we will only have atomic processing for pipelines.

The plan for RSpec 4.0 is to disable monkey patching, reference:
https://rspec.info/blog/2013/07/the-plan-for-rspec-3/#zero-monkey-patching-mode
https://relishapp.com/rspec/rspec-core/docs/configuration/zero-monkey-patching-mode

This commit stops using RSpec monkey patching in several specs.

Since the same instance can go through multiple
status transitions the subsequent changes to `processed`
can be lost since the object is not refresh to exact
DB state.

Always consider processed as a changed value
and persist its current value.

Using cop to find offences

- Update specs to match

The #unrecoverable? and #recoverable? methods were in the presenter but
were related to domain logic. This commit moves them to the model to
better reflect their purpose.

In order to rollout `ci_composite_status`
we need to run that only in a specific context.

This passes project downstream to allow that.

Fixes the scope so that it actually filters by id and lock version

Changes set to let_it_be in spec/models (Batch 1)

This implements atomic processing service
that is able in bulk to update multiple builds,
stages and pipelines.

This uses in-memory structure to calculate statuses
and uses an efficient fetch of DAG dependencies
for efficient processing

This still performs some redundant operations,
but overall it should be significantly faster
processing pipelines of 1000 builds, with
multiple DAG dependencies, as it removes
a number of N+1 problems present in previous
implementation.

This also is order-independent, so it is able
to easily reschedule itself once needed.

This code is also concurrent safe, as if needed
the further processing will be re-scheduled
that will resolve any conflicts.

This commit supports Ci Resource Group status transition

Add changes to start a discussion.

Signed-off-by: Rémy Coutable <remy@rymai.me>

Prepares us for upgrade to Rails 5.2

Prepares us for upgrade to Rails 5.2

Adds `# frozen_string_literal: true` to spec/models ruby files