GraphQL Mutation: Approve or Reject Deployment

Problem

Related to this comment, frontend needs GraphQL Mutation for approving or rejecting deployment.

Proposal

Add a graphql mutation to approve or reject an deployment:

mutation {
  approveDeployment(input: { deploymentId: "gid://gitlab/Deployment/1", status: "APPROVED or REJECTED", comment: "" }) {
    errors
  }
}

It works same with https://docs.gitlab.com/ee/api/deployments.html#approve-or-reject-a-blocked-deployment.