* Prometheus: disable dynamic label lookup on big datasources

- when a prometheus datasource has more than 10000 metrics, label lookup
for the query field is disabled
- installations of that size have slow typehead lookup times and make
the editor sluggish

* Raise dynamic lookup threshold to 10000 metrics

* Run start tasks again

- since the API update, the URL fallback was working, but the response
format also needed adapting: `data` (v1) vs `values` (pre-v1)
- this change looks for either data or values in the response for test
and metadata requests

* introduce checkbox theme variables

* Add checkbox component

* Style tweaks

* Namespace form styles returned from getFormStyles

* wip

* Radio button ui

* Add simple docs for RadioButtonGroup

* Merge fix

* Move radio button variables from theme to component style getter

DisplayProcessor: Interpret empty strings as NaN instead of 0 to support empty value map texts in Singlestat (#20952)

* WIP: intial commit

* Tests: Runs e2e tests

* Refactor: Adds BASE_URL support

* Refactor: Adds namespacing

* Refactor: Cleans up the Page api

* Build: Adds to build-branches-and-prs job for testing

* Build: Hardcoded image for now

* Refactor: Uses Selectors in App

* Refactor: Adds addDataSource flow

* WIP

* Refactor: Adds e2eScenario

* Refactor: Adds add and delete scenarios

* Refactor: Adds logging

* Refactor: Adds ability to for Selectors with variables

* Refactor: Using variable selectors instead

* Refactor: Adds flow until Share Panel

* Refactor: Adds clicking on rendered image link

* Refactor: Deletes log output

* Refactor: Updates snapshots

* Chore: Reverts changes

* Refactor: Removes log plugin because maybe it breaks yarn build

* Refactor: Adds rendered image download

* Refactor: Adds image comparison

* Refactor: Removes uncaught errors override

* Refactor: Changes order of images to compare

* Refactor: Updates truth image

* Build: Updates path to CI artifacts

* Refactor: Cleaning up types and config

* wip

* Refactor: Cleans up external api

* Refactor: More cleanup

* Refactor: More cleanup

* Refactor: Removes usages of Pages and Flows

* Refactor: Removes last traces of Cypress in spec

* Refactor: Adds comments

* Datasource/Loki: Loki now goes to Logs mode when importing prom queries
Closes #20831

* Fixes behavior and adds tests

* Update public/app/features/explore/state/actions.test.ts

* Defined explore query editor for cloudwatch

* Fix types

Closes #20762

Goavro doesn't compile on 32-bit systems.

This reverts commit 413be3a6.

Minor edits

* Add input segment

* Rename story

* Cleanup

* Fix lint error

* More cleanup

* Use measure text util

* Keep value in local state

* Add input segment

* Rename story

* Cleanup

* Fix lint error

* More cleanup

* Export ui component

* Use measure text util

* Update debian-ubuntu installation

Major rework of debian.md, minor updates to a configuration.md and upgrading.md.

* updated docs

Updated per Torkel's comments

* Update debian.md

Added wget to common properties install command

* Update docs/sources/installation/debian.md

Co-Authored-By: Dan Cech <dcech@grafana.com>

* Update docs/sources/installation/debian.md

Co-Authored-By: Dan Cech <dcech@grafana.com>

* Update docs/sources/installation/debian.md

Co-Authored-By: Dan Cech <dcech@grafana.com>

* Update docs/sources/installation/debian.md

Co-Authored-By: Dan Cech <dcech@grafana.com>

* Update docs/sources/installation/debian.md

Co-Authored-By: Dan Cech <dcech@grafana.com>

* Update docs/sources/installation/debian.md

Co-Authored-By: Dan Cech <dcech@grafana.com>

* Update docs/sources/installation/debian.md

Co-Authored-By: Dan Cech <dcech@grafana.com>

* Apply suggestions from code review

Co-Authored-By: Dan Cech <dcech@grafana.com>

* Update upgrading.md

* Update upgrading.md

* Update debian.md

Added ARM link

Updated "open source" word usage.

Updates the docs to work with the website repo - mainly 
relative link updates.
Adds a menu.yaml file to build the sidebar menu (no longer 
using front matter weight).

* Minor fix for meta analytics event

* Fixed dashboardSrv issue

* Added timeSinceNavigationStart