Make API request for each chart

First part of FE for Prometheus API
Dashboard endpoint fetches all info except for chart results
Renders empty groups after loading

Error classes associated with individual stages of
dashboard processing tend to have very long names.
As dashboard post-processing includes more steps,
we will likely need to handle more error cases.
Refactoring to have all errors inherit from a specific
base class will help accommodate this and keep the code
more readable.

Adds a new stage to dashboard processesing step for the
EnvironmentsController::metrics_dashboard endpoint.

Allows the front end to avoid generating the endpoint
unitutive string mutations.

Add a New Copy Button That Works in Modals

Closes #60988

See merge request gitlab-org/gitlab-ce!28676

This copy button manages a local instance of the Clipboard plugin
specific to it, which means it is created/destroyed on the
creation/destruction of the component. This allows it to work well in
gitlab-ui modals, as the event listeners are bound on creation of the
button.

It also allows for bindings to the `container` option of the Clipboard
plugin, which allows it to work within the focus trap set by bootstrap's
modals.

Always show "Pipelines must succeed" checkbox

Closes #57291

See merge request gitlab-org/gitlab-ce!28651

Before: the checkbox was hidden if builds were disabled.

The checkbox should not be linked to the builds feature
because they are 2 separate functionality.

Set project default visibility to max allowed

Closes #62298

See merge request gitlab-org/gitlab-ce!28754

CI variable expression conjunction/disjunction

See merge request gitlab-org/gitlab-ce!27925

Revert "Disable retrying cancelled jobs"

Closes #62350

See merge request gitlab-org/gitlab-ce!29201

Port EE changes from doc/user/project/insights/index.md

Closes gitlab-ee#11974

See merge request gitlab-org/gitlab-ce!29252

Quarantine spec/models/ci/pipeline_schedule_spec.rb

Closes #62760

See merge request gitlab-org/gitlab-ce!29257

See
https://gitlab.com/gitlab-org/gitlab-ce/issues/62760

Docs: Merge 5 api docs from EE to CE

See merge request gitlab-org/gitlab-ce!28633

Simplify notification check for participating

See merge request gitlab-org/gitlab-ce!29188

Backport of 10854-elasticsearch_avoid_db

See merge request gitlab-org/gitlab-ce!28579

Edit "SAML SSO" for SSOT

See merge request gitlab-org/gitlab-ce!29248

Edit Group's "Roadmap" for SSOT

See merge request gitlab-org/gitlab-ce!29245

Resolve "Inline validation for user's name and username length"

Closes #60323

See merge request gitlab-org/gitlab-ce!28095

Fix markdown for HA topic

See merge request gitlab-org/gitlab-ce!29244

Resolve "Default Web IDE's merge request checkbox to true"

Closes #60034

See merge request gitlab-org/gitlab-ce!28665

Introduce service for merge request pipeline creation

See merge request gitlab-org/gitlab-ce!28781

CE Backport: Show tree within Epic containing child Epics and Issues

See merge request gitlab-org/gitlab-ce!28787

Edit "Insights" content to meet SSOT guidelines

See merge request gitlab-org/gitlab-ce!29238

Edited "Epics" to comply with SSOT

See merge request gitlab-org/gitlab-ce!29236

Edited "Custom group-level project templates" for SSOT

See merge request gitlab-org/gitlab-ce!29235