Closes#19598
Fixes bug introduced recently where the new PromQueryEditor did not preserve
the PromContext.Explore set on the query model by PromQueryField which caused
the table to be empty for Prometheus in explore.
* Grafana/Loki: Adds support for new Loki endpoints and metrics
* Adds `/loki/` prefix to new loki endpoints and updates response interfaces
* Improved legacy support
* Removed changes related to plugin.json and added Loki-specific hacks
* Fixes live streaming for legacy loki datasources
* Loki: Updated cheat sheet with new filter syntax
- updated cheat sheet with new filter syntax
- added user-specific examples from the user's label set
- added link to LogQL docs
- separated styles for examples (clickable) and expressions
* Review feedback
* Explore: Adds support for new loki 'start' and 'end' params for labels endpoint
Also initializes absoluteRange when explore is initialized
Closes#16788
* Explore: Dispatches updateTimeRangeAction instead of passing absoluteRange when initializing
Also removes dependency on sinon from loki language provider test
* Loki: Refactors transformation of absolute time range to URL params into small utility function
* Makes use of rangeToParams() util function in loki language provider test
Also updates LanguageProvider.request() interface so that url should be type string, and adds optional params argument
* Refactor: Removes replaceUrl from actions
* Refactor: Moves saveState thunk to epic
* Refactor: Moves thunks to epics
* Wip: removes resulttype and queries once
* Refactor: LiveTailing uses observer in query
* Refactor: Creates epics folder for epics and move back actioncreators
* Tests: Adds tests for epics and reducer
* Fix: Checks for undefined as well
* Refactor: Cleans up previous live tailing implementation
* Chore: merge with master
* Fix: Fixes url issuses and prom graph in Panels
* Refactor: Removes supportsStreaming and adds sockets to DataSourcePluginMeta instead
* Refactor: Changes the way we create TimeSeries
* Refactor: Renames sockets to streaming
* Refactor: Changes the way Explore does incremental updates
* Refactor: Removes unused method
* Refactor: Adds back Loading indication
* Style: made outlined buttons and used it in Alert component
* Refactor: clean up state on load data source failure
* Refactor: test data source thunk created
* Refactor: move logic to changeDatasource and call that from intialize
* Refactor: move load explore datasources to own thunk
* Refactor: move logic to updateDatasourceInstanceAction
* Tests: reducer tests
* Test(Explore): Added tests and made thunkTester async
* Fix(Explore): Fixed so that we do not render StartPage if there is no StartPage
* Fix(Explore): Missed type in merge
* Refactor: Thunktester did not fail tests on async failures and prevented queires from running on datasource failures
* Feat: Fadein error alert to prevent flickering
* Feat: Refresh labels after reconnect
* Refactor: Move useLokiForceLabels into useLokiLabels from PR comments
* Feat: adds refresh metrics to Prometheus languageprovider
* Style: removes padding for connected datasources
* Chore: remove implicit anys
* Migrated loki syntax and labels logic to useLokiSyntax hook
* Enable loki labels refresh after specified interval has passed
* Enable periodic loki labels refresh when labels selector is opened
* Fix prettier
* Add react-hooks-testing-library and disable lib check on typecheck
* Add tests for loki syntax/label hooks
* Move tsc's skipLibCheck option to tsconfig for webpack to pick it up
* Set log labels refresh marker variable when log labels fetch start
* Fix prettier issues
* Fix type on activeOption in useLokiLabel hook
* Typo fixes and types in useLokiSyntax hook test fixes
* Make sure effect's setState is not performed on unmounted component
* Extract logic for checking if is component mounted to a separate hook
