feat: add loki role

[voidquark]

solving issue - #187

Migration of https://github.com/voidquark/loki into the Grafana collection.

I've integrated molecule testing for the Loki role, leveraging the same approach used in the previous repository. Results are under actions->loki-molecule.

[CLAassistant]

All committers have signed the CLA.

[ishanjainn]

cc @GVengelen as you had mentioned about adding a Loki role, Do you wanna take a pass at this too?

[GVengelen]

cc @GVengelen as you had mentioned about adding a Loki role, Do you wanna take a pass at this too?

Yes, will have a look this weekend

[GVengelen]

@voidquark looks to me. To be inline with other roles, could you add examples?

[voidquark]

@GVengelen I've included two examples in 7be7334 . One demonstrates a simple default role deployment, while the other showcases a local filesystem deployment with retention settings and an example alerting rule.

[ishanjainn]

LGTM me too!
@voidquark I sent you an invite to add you as a collaborator in this repo. Once you accept I think we should be good to merge.

Also, Like i mentioned to @GVengelen aswell, Do you wanna write. a blogpost on the grafana's blog about this role, If yes, Could you share the google doc link(Can be empty for now, Just need the link so that I can check it later once you have it completed)

[voidquark]

@ishanjainn I have accepted the invitation.

[voidquark]

@ishanjainn Once merged. I'll keep you updated on the progress of the blog post via Slack.

[ishanjainn]

Merging this!
Thanks for the contribution @voidquark, Looking forward to this one in the wild!