Add resources for creating ML managed alerts

[csmarchbanks]

No description provided.

[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.

[julienduchesne]

Same comment as #1653 (comment) 😓

[csmarchbanks]

Ok, updated to use the new framework and got tests passing again.

[julienduchesne]

Nice 🚀 A few small things to fix

[csmarchbanks]

Addressed all the comments but I am running into an OnCall test that seems to be consistently failing:

=== NAME  TestAccDataSourceTeam_Basic
    data_source_team_test.go:17: Step 1/1 error: Error running apply: exit status 1
        
        Error: couldn't find a team matching: test-acc-pgbfl46w
        
          with data.grafana_oncall_team.test-acc-team,
          on terraform_plugin_test.tf line 6, in data "grafana_oncall_team" "test-acc-team":
           6: data "grafana_oncall_team" "test-acc-team" {
        
--- FAIL: TestAccDataSourceTeam_Basic (62.65s)

edit: enough retries and everything passed!

[ioanarm]

Looks good to me Chris, the examples as well.
Had a look at the new resources to try and make sense of the changes.

Let's wait for @julienduchesne to give it another go though in case there is something else though.