Add external control fields to Control GraphQL API

What does this MR do and why?

Add external control fields to GraphQL API

• control_type
• external_url
• secret_token (update only)

We want to be able to provide an interface that updates the external control fields.

References

• Add external control to control graphql API
• Update GraphQL API to allow creating external compliance requirements

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Screenshots or screen recordings

** No UI changes

How to set up and validate locally

Run these GraphQL queries

mutation {
  createComplianceRequirementsControl(input: {
    complianceRequirementId: "gid://gitlab/ComplianceManagement::ComplianceFramework::ComplianceRequirement/24",
    params: {
      name: "external_control",
      controlType: "external",
      externalUrl: "https://www.google.com/123",
      secretToken: "DASDAS"
    }
  }) {
    errors
    clientMutationId,
    requirementsControl{
      name,
      expression,
      id,
      controlType
    }
  }
}

mutation {
  updateComplianceRequirementsControl(input: {
    id: "gid://gitlab/ComplianceManagement::ComplianceFramework::ComplianceRequirementsControl/10"
    params: {
      name: "minimum_approvals_required_2",
      controlType: "internal",
      expression: "{\"field\":\"minimum_approvals_required\",\"operator\":\"=\",\"value\":2}"
    }
  }) {
    errors
    clientMutationId,
    requirementsControl{
      name,
      expression,
      id,
      controlType,
      externalUrl
    }
  }
}