[Feature Request]: add ability to validate the manifests

[yasharne]

Feature Request

Hi
I want to use grizzly in the pipeline of git, I want also to be able to validate the yaml file to see if it has all the requires files e.g. for loki datasource.
Can we have a flag to check and validate the yml file? something like promtool check config command

[ii-jswoods]

I think this is a good feature to implement, ideally a dry-run option that would serve this purpose isn't currently available (though it could be in the future?). Static analysis checks could work through validating types and checking defined references exist elsewhere in config like data sources, uids and folders - just needs to be something simple that serves the purpose of saying this is valid grizzly config.