* Explore: Remove datasource testing on selector
- datasource testing gets in the way of fast query iteration: switching
between datasources can take seconds
- it should not be explore's duty to test datasources in the first place
- removed the concept of datasourceError in Explore, should not be its
concern
- datasource erorrs will express themselves in query errors just fine
- connection errors are still bubbled up
- removed reconnection logic from explore, should not be its concern
- missing labels in loki are still "visible" via an empty label selector
- Loki and Prometheus treated connection errors differently than other
datasources, making sure to pass through the original error message
* Show datasource error in query field for prom/loki/influx
* Removed connection test case, fixed disabled state
* Implement Label component
* Expose next-gen form components from grafana-ui under Forms namespace
* adding knobs to story, setting new variants and sizes
* handle next gen button in their own component
* removing duplication
* fix Thresholds test
* removing blank lines
* moving noUnusedLocals
* new button should not need theme
* remove not used export
* pseudo classes for focus state
* remove not used things
* use correct border radius
* extracting focus styles to commonStyles for reuse
* tidying up getButtonStyles
* Adding a few examples to the doc
* Adding props table
* build: Install musl cross compilers as part of build Docker image
* build: Build also musl packages in scripts/build/build.sh
* scripts/build/build-all.sh: Build musl Linux targets
* build: Upgrade build-container to 1.2.11
* build.go: De-duplicate code
* build: Base Docker images on musl binaries
* Making flowchart work
* Enable testEnvironment jest option
* Add babel-jest to grafana-toolkit
* Fix test
* Resolve either js or ts jest setup files
* Update packages/grafana-toolkit/src/config/jest.plugin.config.ts
* Update packages/grafana-toolkit/src/config/webpack.plugin.config.ts
* Implement Label component
* Expose next-gen form components from grafana-ui under Forms namespace
* Minor Label update
* Add Legend component
* Test form story
* Expose Legend class name via getFormStyles
* Test
* FieldValidationMessage spacing
* Expose FieldValidationMessage styles via getFormStyles
* Update snapshot
* Make it clear that role switching is not supported
* Update docs/sources/features/datasources/cloudwatch.md
Co-Authored-By: Marcus Efraimsson <marcus.efraimsson@gmail.com>
