* 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
* wip: began work off removing meta and pluginExports from DataSourceApi interface
* WIP: changing how plugins are exports and loaded
* Down the refactoring rabit hole that keeps expanding
* TestData now returns DataSourcePlugin
* Refactoring: fixed app config page loading, type renamings and more typings
* Refactor: Correct casing on DatasourceStatus => DataSourceStatus
* 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
