Deprecate all prometheus integration mutations and always return http integrations instead

What does this MR do and why?

As of Allow Prometheus' metrics dashboard and incomin... (#338838 - closed), we have fully consolidated generic alerting integrations and Prometheus-specific integrations into one model.

Updates to Integrations::Prometheus records are currently being synced to a corresponding AlertManagement::HttpIntegration. This MR updates the prometheus-specific mutations to make updates directly on the corresponding AlertManagement::HttpIntegration.

This MR:

• deprecates all queries and mutations using the AlertManagementPrometheusIntegration type
• replaces any return values with the corresponding AlertManagementHttpIntegration type

References

• https://gitlab.com/gitlab-org/gitlab/-/issues/409734+

How to set up and validate locally

Pre-req: a project with a legacy prometheus integration

1. Find a project without a prometheus integration
   • Project.ids.sort - Integrations::Prometheus.pluck(:project_id)
2. Create legacy prometheus integration for that project
   • Integrations::Prometheus.create!(project_id: 64, manual_configuration: true)
3. Initialize token for the integration
   • Alerting::ProjectAlertingSetting.create!(project_id: 64)
4. There should also now be an alerting integration for the project
   • AlertManagement::HttpIntegration.find_by(project_id: 64, type_identifier: :prometheus)

Testing graphql changes

Executing from http://gdk.test:3000/-/graphql-explorer:

Query alertManagementIntegrations

query httpintegrations { 
  project(fullPath: "gitlab-qa-product-analytics/product-analytics-g-52f8a073f314e28c/project-analytics-p-bb2c3a2770d54b52-c64ec02d2900d1ed"
") { 
    alertManagementIntegrations {
      nodes {
        id
        type
        name
        active
      }
    }
  }
}

Before

{
  "data": {
    "project": {
      "alertManagementIntegrations": {
        "nodes": [
          {
            "id": "gid://gitlab/AlertManagement::HttpIntegration/261",
            "type": "PROMETHEUS",
            "name": "Prometheus",
            "active": true
          }
        ]
      }
    }
  },
  "correlationId": "01JYFE3J53HHQ1Y2C1NM61GEBS"
}

After

{
  "data": {
    "project": {
      "alertManagementIntegrations": {
        "nodes": [
          {
            "id": "gid://gitlab/Integrations::Prometheus/27",
            "type": "PROMETHEUS",
            "name": "Prometheus",
            "active": true
          }
        ]
      }
    }
  },
  "correlationId": "01JYFE4SZC50CE99XV2NS2JZFR"
}

Query by GID alertManagementIntegrations(id: "")

query httpintegration { 
  project(fullPath: "gitlab-qa-product-analytics/product-analytics-g-52f8a073f314e28c/project-analytics-p-bb2c3a2770d54b52-c64ec02d2900d1ed") { 
    alertManagementIntegrations(id: "gid://gitlab/Integrations::Prometheus/27") {
      nodes {
        id
        type
        name
        active
      }
    }
  }
}

before

{
  "data": {
    "project": {
      "alertManagementIntegrations": {
        "nodes": [
          {
            "id": "gid://gitlab/Integrations::Prometheus/27",
            "type": "PROMETHEUS",
            "name": "Prometheus",
            "active": true
          }
        ]
      }
    }
  },
  "correlationId": "01JYFEEF4QHRPGS2PR2MKR2Q3E"
}

after

{
  "data": {
    "project": {
      "alertManagementIntegrations": {
        "nodes": [
          {
            "id": "gid://gitlab/AlertManagement::HttpIntegration/261",
            "type": "PROMETHEUS",
            "name": "Prometheus",
            "active": true
          }
        ]
      }
    }
  },
  "correlationId": "01JYFEG8X75ZVT89JP8CS5A05K"
}

Create

mutation create($input: PrometheusIntegrationCreateInput!) {
  prometheusIntegrationCreate(input: $input) {
    integration {
      id
      type
      name
      active
    }
    errors 
  }
}

{ 
  "input": {
    "projectPath": "gitlab-qa-product-analytics/product-analytics-g-52f8a073f314e28c/project-analytics-p-bb2c3a2770d54b52-c64ec02d2900d1ed", 
    "active": true
  }
}

Before -- with existing integration

{
  "data": {
    "prometheusIntegrationCreate": {
      "integration": null,
      "errors": [
        "Multiple Prometheus integrations are not supported"
      ]
    }
  },
  "correlationId": "01JYFEVWVCFPBGS4ZS7N6FCA7G"
}

Before -- without existing integration (I'm just using a different project)

{
  "data": {
    "prometheusIntegrationCreate": {
      "integration": {
        "id": "gid://gitlab/Integrations::Prometheus/28",
        "type": "PROMETHEUS",
        "name": "Prometheus",
        "active": true
      },
      "errors": []
    }
  },
  "correlationId": "01JYFF06TE69QD69WXK63GG7ED"
}

After

{
  "data": {
    "prometheusIntegrationCreate": {
      "integration": {
        "id": "gid://gitlab/AlertManagement::HttpIntegration/262",
        "type": "PROMETHEUS",
        "name": "Prometheus",
        "active": true
      },
      "errors": []
    }
  },
  "correlationId": "01JYFENN8DA2KGH1TQVATT46NR"
}

Update

mutation update($input: PrometheusIntegrationUpdateInput!) {
  prometheusIntegrationUpdate(input: $input) {
    integration {
      id
      type
      name
      active
    }
    errors 
  }
}

{ 
  "input": {
     "id": "gid://gitlab/Integrations::Prometheus/28", 
    "active": false
  }
}

Before

{
  "data": {
    "prometheusIntegrationUpdate": {
      "integration": {
        "id": "gid://gitlab/Integrations::Prometheus/28",
        "type": "PROMETHEUS",
        "name": "Prometheus",
        "active": false
      },
      "errors": []
    }
  },
  "correlationId": "01JYFF6X7ANMAQT5T5Z9HS2VME"
}

After

{
  "data": {
    "prometheusIntegrationUpdate": {
      "integration": {
        "id": "gid://gitlab/AlertManagement::HttpIntegration/264",
        "type": "PROMETHEUS",
        "name": "Prometheus",
        "active": false
      },
      "errors": []
    }
  },
  "correlationId": "01JYFFA739TSESSQNCZ3S6R8J8"
}

Reset Token

mutation resettoken($input: PrometheusIntegrationResetTokenInput!) {
  prometheusIntegrationResetToken(input: $input) {
    integration {
      id
      type
      name
      token
    }
    errors 
  }
}

{ 
  "input": {
     "id": "gid://gitlab/Integrations::Prometheus/28"
  }
}

before

{
  "data": {
    "prometheusIntegrationResetToken": {
      "integration": {
        "id": "gid://gitlab/Integrations::Prometheus/28",
        "type": "PROMETHEUS",
        "name": "Prometheus",
        "token": "e660a94a177c78bc2b0d8c27a535510e"
      },
      "errors": []
    }
  },
  "correlationId": "01JYFFF3QEN7VGA16C5V5V7DCX"
}

after

{
  "data": {
    "prometheusIntegrationResetToken": {
      "integration": {
        "id": "gid://gitlab/AlertManagement::HttpIntegration/264",
        "type": "PROMETHEUS",
        "name": "Prometheus",
        "token": "0b76f068da76fe87a2875bc45e2f420c"
      },
      "errors": []
    }
  },
  "correlationId": "01JYFFDSCSW7V5D8J8P5SYNXVE"
}

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