feat: Add Frontend Observability provider

[kpelelis]

This commit adds the groundwork to support Frontend Observability as code. More specificailly, the change contains

1. A Go HTTP client that consumes the Apps API (Create/Read/Update/Delete)
2. Data Source and Resource version of the Frontend Observability App entity.

[github-actions]

In order to lower resource usage and have a faster runtime, PRs will not run Cloud tests automatically.
To do so, a Grafana Labs employee must trigger the cloud acceptance tests workflow manually.

[Alex3k]

Hey @kpelelis this is awesome thank you! I have been after this for about a year :)

I noticed the thing about getting the frontend o11y API URL. Would it be possible to update the grafana cloud provider to return this instead? Otherwise the frontend o11y terraform provider can’t be used when creating a grafana cloud stack within the same terraform, it can only be used in situations with an existing stack which isn’t ideal for the whole everything as code paradigm

[kpelelis]

Hey @Alex3k thank you so much for your feedback. I updated the terraform API that it uses as minimal data as possible. Check the examples and how to set the feature up

[Alex3k]

Is it possible to set Combine K6 with RUM data in this resource also for each frontend o11y app?

[kpelelis]

Yes! Its possible from the settings using the "combineLabData" setting

[Alex3k]

I couldn't see any docs on what the possible settings are for this block - is that something we plan to add? or maybe a link to some other docs that indicate what options are available?

[kpelelis]

I added documentation on the settings that we currently have available (More to be released soon ;) )

[Alex3k]

Hey @Alex3k thank you so much for your feedback. I updated the terraform API that it uses as minimal data as possible. Check the examples and how to set the feature up

This is awesome! I like that you can use cloud_access_policy_token as an alternative to frontend_o11y_api_access_token but can still use two separate tokens if you like. Very helpful.

I added a few comments around the settings block of the grafana_frontend_o11y_app resource.

I'd love to give this a run through and see how our current automation fits into this. When it's ready can you let me know so I can have a play?