* Rendering: add CSV rendering support
* Rendering: save csv files into a separate folder
* add missing field
* Renderer: get filename from renderer plugin
* apply PR suggestions
* Rendering: remove old PhantomJS error
* Rendering: separate RenderCSV and Render functions
* fix alerting test
* Rendering: fix handling error in HTTP mode
* apply PR feedback
* Update pkg/services/rendering/http_mode.go
Co-authored-by: Joan López de la Franca Beltran <joanjan14@gmail.com>
* apply PR feedback
* Update rendering metrics with type label
* Rendering: return error if not able to parse header
* Rendering: update grpc generated file
* Rendering: use context.WithTimeout to render CSV too
Co-authored-by: Joan López de la Franca Beltran <joanjan14@gmail.com>