* refactor metrics request
* Update pkg/tsdb/cloudwatch/routes/dimension_keys_test.go
Co-authored-by: Shirley <4163034+fridgepoet@users.noreply.github.com>
* return metric struct value intead of pointer
* make it possible to test hard coded metrics service
* test all paths in route
* fix broken test
* fix one more broken test
* add integration test
Co-authored-by: Shirley <4163034+fridgepoet@users.noreply.github.com>
* use new layered architecture in get dimension keys request
* go lint fixes
* pr feedback
* more pr feedback
* remove not used code
* refactor route middleware
* change signature
* add integration tests for the dimension keys route
* use request suffix instead of query
* use typed args also in frontend
* remove unused import
* harmonize naming
* fix merge conflict
