* Refactor: initial commit
* Tests: updates tests
* Tests: updates snapshots
* Chore: updates after PR comments
* Chore: renamed initVariablesBatch
* Tests: adds transactionReducer tests
* Chore: updates after PR comments
* Refactor: renames cancelAllDataSourceRequests
* Refactor: reduces cancellation complexity
* Tests: adds tests for cancelAllInFlightRequests
* Tests: adds initVariablesTransaction tests
* Tests: adds tests for cleanUpVariables and cancelVariables
* Always cleanup dashboard on unmount, even if init is in progress. Check if init phase has changed after services init is completed
* fixed failing tests and added some more to test new scenario.
Co-authored-by: Torkel Ödegaard <torkel@grafana.com>
Co-authored-by: Marcus Andersson <marcus.andersson@grafana.com>
