* Variables: turns on newVariables as default
* Chore: adds default templating state
* Some small refactorings to get the template_srv tests to get green when toggle is enabled by default.
* Refactor: adds getVariables dependency to DashboardModel
* Tests: fixes StackDriver tests
* Tests: updates snapshots
* Tests: updates snapshot for DashboardGrid.test.tsx
* Tests: fixes DashboardModel.test.ts
* fixed initDashboard tests.
* renamed variable.
* changed so we use the templating.list when running the migration work.
* changed so we always returns the variables in sorted order.
* Tests: fixed cloudwatch tests
* added so we set the global template variable props.
* Fixed tests and added moved logic to complete templateSrv variables.
* removed unneccesary updateIndex.
Co-authored-by: Marcus Andersson <marcus.andersson@grafana.com>
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.
