* Chore: move constants to own file
* Chore: moves safe* functions to grafana/data
* Chore: moves safe* functions to grafana/data
* Chore: adds VariableQueryEditorProps and deprecates VariableQueryProps
* Chore: remove getDefaultVariableAdapters function
* Chore: moves transaction status to types
* Chore: fix tests that do not initialise TemplateSrv
* Chore: change space when stringifying
* Chore: revert safe* func move
* Chore: remove circular dependency in Explore utils