Remove Kn services cache from Clusters::Application::Knative

Knative function can exist even if user did not installed Knative via
GitLab managed apps.

-> Move responsibility of finding services into the Cluster
-> Responsability is inside Clusters::Cluster::KnativeServiceFinder
-> Projects::Serverless::FunctionsFinder now calls depends solely on a
cluster to find the Kn services.
-> Detect Knative by resource presence instead of service presence
-> Mock knative_installed response temporarily for frontend to develop

Display loader while `installed === 'checking'`

Added frontend work to determine if Knative is installed

Memoize with_reactive_cache(*args, &block) to avoid race conditions

When calling with_reactive_cache more than once, it's possible that the
second call will already have the value populated. Therefore, in cases
where we need the sequential calls to have consistent results, we'd fall
under a race condition.

Check knative installation via Knative resource presence

Only load pods if Knative is discovered

Always return a response in FunctionsController#index

- Always indicate if Knative is installed, not installed or checking
- Always indicate the partial response for functions. Final response is
guaranteed when knative_installed is either true | false.

Adds specs for Clusters::Cluster#knative_services_finder

Fix method name when calling on specs

Add an explicit check for functions

Added an explicit check to see if there are any functions available

Fix Serverless feature spec

- we don't find knative installation via database anymore,
rather via Knative resource

Display error message for request timeouts

Display an error message if the request times out

Adds feature specs for when functions exist

Remove a test purposed hardcoded flag

Add ability to partially load functions

Added the ability to partially load functions on the frontend

Add frontend unit tests

Added tests for the new frontend additions

Generate new translations

Generated new frontend translations

Address review comments

Cleaned up the frontend unit test.
Added computed prop for `isInstalled`.

Move string to constant

Simplify nil to array conversion

Put knative_installed states in a frozen hash for better read

Pluralize list of Knative states

Quey services and pods filtering name

This way we don't need to filter the namespace in memory.
Also, the data we get from the network is much smaller.

Simplify cache_key and fix bug

- Simplifies the cache_key by removing namespace duplicate
- Fixes a bug with reactive_cache memoization

Allow downloading report artifacts

Closes #49265

See merge request gitlab-org/gitlab-ce!27974

Show if a user is using a license seat

See merge request gitlab-org/gitlab-ce!28790

Remove leading whitespace on translatable string: "Status"

See merge request gitlab-org/gitlab-ce!23856

Increase karma global timeout

See merge request gitlab-org/gitlab-ce!28850

Fixes repository Vue router hiding elements on root URL

See merge request gitlab-org/gitlab-ce!28821

Revert useless timeout added in karma spec

Correct CI_API_V4_URL CI variable name

See merge request gitlab-org/gitlab-ce!28849

Disable proxy in container scanning template

Closes gitlab-ee#11105

See merge request gitlab-org/gitlab-ce!27246

closes https://gitlab.com/gitlab-org/gitlab-ee/issues/11105

Improve documentation of RegExp in CI/CD job ref patterns

See merge request gitlab-org/gitlab-ce!28139

as requested by https://gitlab.com/gitlab-org/gitlab-ce/issues/30477#note_29060568 in #30477

Bumps Kubernetes in Auto DevOps to 1.11.10

See merge request gitlab-org/gitlab-ce!28525

Un-quarantine Auto DevOps QA test

Closes gitlab-org/quality/nightly#81

See merge request gitlab-org/gitlab-ce!28765

Add notify_only_default_branch option to PipelinesEmailService

Closes #61721

See merge request gitlab-org/gitlab-ce!28271

Add a column header to admin/jobs page

Closes #62347

See merge request gitlab-org/gitlab-ce!28837

Add MR as common abbreviation for 'Merge Request'

See merge request gitlab-org/gitlab-ce!28793

Disable webkit icons

Closes #62227

See merge request gitlab-org/gitlab-ce!28833

Use SCSS maps and lists to keep code DRY

See merge request gitlab-org/gitlab-ce!28702

This column was blank before. It contain one or two pieces of
information:

* Job duration
* Job completion timestamp

For brevity, use `Timing` as the header.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/62347

Add documentation for element naming conventions

See merge request gitlab-org/gitlab-ce!28563

Externalize strings of chat page in user profile

See merge request gitlab-org/gitlab-ce!28632

Docs for a downstream pipeline variables expansion

See merge request gitlab-org/gitlab-ce!28828

Externalize strings of notifications page in user profile

See merge request gitlab-org/gitlab-ce!28745

Disable webkit icons to make room for our icons.
Add changelog
Fix lint, add ignore to stylelint
Add enable to start lint again

Implement dynamic validation on QA Pages

Closes gitlab-qa#280

See merge request gitlab-org/gitlab-ce!25704

Since number fields, text boxes, text areas are editable
lets use _field as the vague descriptor

Refactor all capital files to lowercase
Signed-off-by: ddavison <ddavison@gitlab.com>

Truncates job names in pipeline graph

Closes #62408

See merge request gitlab-org/gitlab-ce!28824

Extracts combining the job_artifacts relation with the with_reports
scope for getting report artifacts into a method.

Exposes report download paths in build details.