* add GetCommandsFromPipeline
* refactor method GetCommandType to func GetExpressionCommandType
* add function to create fingerprint frames
* add function to determine whether raw query represents a hysteresis command and a function to patch it with loaded metrics
* add NodeTypeFromDatasourceUID and DataSourceModelFromNodeType()
* deprecate expr.DataSourceModel
* replace usages of IsDataSource to NodeTypeFromDatasourceUID
* replace usages of DataSourceModel to DataSourceModelFromNodeType()
* make TimeRange interface and add relative range
* make Execute methods support the current time
* update resample to support relative time range
* update DSNode to support relative time range
* update query service to create queries with absolute time
* make alerting evaluator create relative time ranges
* refactor datasource loading
* refactor datasource loading
* pass uid
* use dscache in alerting to get DS
* remove expr/translate pacakge
* remove dup injection entry
* fix DS type on metrics endpoint, remove SQL DS lookup inside SSE
* update test and adapter
* comment fix
* Make eval run as admin when getting datasource info
Co-authored-by: Marcus Efraimsson <marcus.efraimsson@gmail.com>
* fmt and comment
* remove unncessary/redundant code
Co-authored-by: Kyle Brandt <kyle@grafana.com>
Co-authored-by: Marcus Efraimsson <marcus.efraimsson@gmail.com>
Co-authored-by: Santiago <santiagohernandez.1997@gmail.com>