feat: add templates.mobile_app to OnCall Integration resource

[joeyorlando]

Closes #1665

Local Testing

Create

terraform {
  required_providers {
    grafana = {
      source  = "grafana/grafana"
      version = "1.0.0"
    }
  }
}

provider "grafana" {
  alias               = "oncall"
  oncall_access_token = "<redacted>"
  oncall_url          = "http://localhost:8080"
}

resource "grafana_oncall_integration" "my-integration" {
  provider = grafana.oncall
  name     = "my integration"
  type     = "grafana"
  default_route {}

  templates {
    mobile_app {
        title = "foo bar baz"
        message = "hello world"
    }
  }
}

❯ terraform apply -auto-approve

...

grafana_oncall_integration.test-acc-integration: Refreshing state... [id=CHR8DFBTWLT1I]
grafana_oncall_integration.test-acc-integration2: Refreshing state... [id=CJB1TH28FTW46]

Terraform used the selected providers to generate the following execution plan. Resource actions are indicated with the following symbols:
  + create

Terraform will perform the following actions:

  # grafana_oncall_integration.my-integration will be created
  + resource "grafana_oncall_integration" "my-integration" {
      + id   = (known after apply)
      + link = (known after apply)
      + name = "my integration"
      + type = "grafana"

      + default_route {
          + id = (known after apply)
        }

      + templates {
          + mobile_app {
              + message = "hello world"
              + title   = "foo bar baz"
            }
        }
    }

Plan: 1 to add, 0 to change, 0 to destroy.
grafana_oncall_integration.my-integration: Creating...
grafana_oncall_integration.my-integration: Creation complete after 1s [id=CBZVSQLZYCMVI]

Apply complete! Resources: 1 added, 0 changed, 0 destroyed.

Update

resource "grafana_oncall_integration" "my-integration" {
  provider = grafana.oncall
  name     = "my integration"
  type     = "grafana"
  default_route {}

  templates {
    mobile_app {
        title = "foo bar baz1"
        message = "hello world2"
    }
  }
}

❯ terraform apply -auto-approve

...

grafana_oncall_integration.my-integration: Refreshing state... [id=CBZVSQLZYCMVI]

Terraform used the selected providers to generate the following execution plan. Resource actions are indicated with the following symbols:
  ~ update in-place

Terraform will perform the following actions:

  # grafana_oncall_integration.my-integration will be updated in-place
  ~ resource "grafana_oncall_integration" "my-integration" {
        id   = "CBZVSQLZYCMVI"
        name = "my integration"
        # (2 unchanged attributes hidden)

      ~ templates {
          ~ mobile_app {
              ~ message = "hello world" -> "hello world2"
              ~ title   = "foo bar baz" -> "foo bar baz1"
            }
        }

        # (1 unchanged block hidden)
    }

Plan: 0 to add, 1 to change, 0 to destroy.
grafana_oncall_integration.my-integration: Modifying... [id=CBZVSQLZYCMVI]
grafana_oncall_integration.my-integration: Modifications complete after 1s [id=CBZVSQLZYCMVI]

Apply complete! Resources: 0 added, 1 changed, 0 destroyed.

Update (remove template)

resource "grafana_oncall_integration" "my-integration" {
  provider = grafana.oncall
  name     = "my integration"
  type     = "grafana"
  default_route {}

  templates {
    # mobile_app {
    #     title = "foo bar baz1"
    #     message = "hello world2"
    # }
  }
}

❯ terraform apply -auto-approve

...

grafana_oncall_integration.my-integration: Refreshing state... [id=CBZVSQLZYCMVI]

Terraform used the selected providers to generate the following execution plan. Resource actions are indicated with the following symbols:
  ~ update in-place

Terraform will perform the following actions:

  # grafana_oncall_integration.my-integration will be updated in-place
  ~ resource "grafana_oncall_integration" "my-integration" {
        id   = "CBZVSQLZYCMVI"
        name = "my integration"
        # (2 unchanged attributes hidden)

      ~ templates {
          - mobile_app {
              - message = "hello world2" -> null
              - title   = "foo bar baz1" -> null
            }
        }

        # (1 unchanged block hidden)
    }

Plan: 0 to add, 1 to change, 0 to destroy.
grafana_oncall_integration.my-integration: Modifying... [id=CBZVSQLZYCMVI]
grafana_oncall_integration.my-integration: Modifications complete after 0s [id=CBZVSQLZYCMVI]

Apply complete! Resources: 0 added, 1 changed, 0 destroyed.

[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.

[Duologic]

The failing acceptance test is unrelated to this PR, I'd say we merge it.

=== NAME  TestAccSLO_recreate
    resource_slo_test.go:147: Step 2/3 error: Expected a non-empty plan, but got an empty plan
2024/09/24 16:42:14 [DEBUG] GET ***api/plugins/grafana-slo-app/resources/v1/slo
2024/09/24 16:42:14 [DEBUG] DELETE ***api/plugins/grafana-slo-app/resources/v1/slo/cujb254umedpubmd9e7yj
2024/09/24 16:42:14 [DEBUG] GET ***api/plugins/grafana-slo-app/resources/v1/slo/b680qkp4buhdrw540dhn3
2024/09/24 16:42:15 [DEBUG] GET ***api/plugins/grafana-slo-app/resources/v1/slo/cujb254umedpubmd9e7yj
2024/09/24 16:42:15 [DEBUG] GET ***api/plugins/grafana-slo-app/resources/v1/slo
2024/09/24 16:42:15 [DEBUG] GET ***api/plugins/grafana-slo-app/resources/v1/slo/5d7fsr69d63k6au5fqh67
--- FAIL: TestAccSLO_recreate (12.28s)