* add prom query var editor with tests and migrations
* fix migration, now query not expr
* fix label_values migration
* remove comments
* fix label_values() variables order
* update UI and use more clear language
* fix tests
* use null coalescing operators
* allow users to query label values with label and metric if they have not set there flavor and version
* use enums instead of numbers for readability
* fix label&metrics switch
* update type in qv editor
* reuse datasource function to get all label names, getLabelNames(), prev named getTagKeys()
* use getLabelNames in the query var editor
* make label_values() variables label and metric more readable in the migration
* fix tooltip for label_values to remove API reference
* clean up tooltips and allow newlines in query_result function
* change function wording and exprType to query type/qryType for readability
* update prometheus query variable docs
* Update public/app/plugins/datasource/prometheus/components/VariableQueryEditor.tsx
Co-authored-by: Galen Kistler <109082771+gtk-grafana@users.noreply.github.com>
* handle jsonnet grafana as code variables
---------
Co-authored-by: Galen Kistler <109082771+gtk-grafana@users.noreply.github.com>
* add prom query var editor with tests and migrations
* fix migration, now query not expr
* fix label_values migration
* remove comments
* fix label_values() variables order
* update UI and use more clear language
* fix tests
* use null coalescing operators
* allow users to query label values with label and metric if they have not set there flavor and version
* use enums instead of numbers for readability
* fix label&metrics switch
* update type in qv editor
* reuse datasource function to get all label names, getLabelNames(), prev named getTagKeys()
* use getLabelNames in the query var editor
* make label_values() variables label and metric more readable in the migration
* fix tooltip for label_values to remove API reference
* clean up tooltips and allow newlines in query_result function
* change function wording and exprType to query type/qryType for readability
* update prometheus query variable docs
* Update public/app/plugins/datasource/prometheus/components/VariableQueryEditor.tsx
Co-authored-by: Galen Kistler <109082771+gtk-grafana@users.noreply.github.com>
---------
Co-authored-by: Galen Kistler <109082771+gtk-grafana@users.noreply.github.com>