* Fix SQL query variable throwing error if query returns no data
* Tests to verify that metricFindQuery returns properly and doesn't throw error
* Fix all codepaths that might throw errors because of undefined backendSrv response
* Fix: sql plugins feature
* SQLDS: Use builtin annotation editor
Plus strict rule fixes
* MSSQL: Migrate query editor to React
* Make code editor work
* Make SQLOptions and SQLQuery in SQLDatasource and in Editor generic
* MSSQL: Fix ts issues
* Fix SQLDatasource refID
* Remove comment
* Revert "Make SQLOptions and SQLQuery in SQLDatasource and in Editor generic"
This reverts commit 1d15b4061a0a08a0a6fdbdac6cbf8336f0b4df0c.
* Fix ts issues without generic
* TS