Filter issues by health status

What does this MR do and why?

Filter issues by health status in GraphQL

How to set up and validate locally

1. create some issues in a project, assign some health statuses to some of them
2. In GraphiQL, use the query

query {
	project(fullPath: "group/project_path") 
  {
issues(healthStatus: atRisk, first: 5) {
      nodes {
        title
        healthStatus
      }
    }
  }

You should get something like

{
  "data": {
    "project": {
      "issues": {
        "nodes": [
          {
            "title": "Top Banner with user information",
            "healthStatus": "atRisk"
          },
          {
            "title": "User sign up page view",
            "healthStatus": "atRisk"
          },
          {
            "title": "User login page view",
            "healthStatus": "atRisk"
          }}}}}}

db things

up

$ brake db:migrate:up:main VERSION=20220831021358
main: == 20220831021358 AddIndexOnIssueHealthStatus: migrating ======================
main: -- transaction_open?()
main:    -> 0.0000s
main: -- index_exists?(:issues, [:project_id, :health_status, :created_at, :id], {:name=>"index_issues_on_project_id_health_status_created_at_id", :algorithm=>:concurrently})
main:    -> 0.0190s
main: -- execute("SET statement_timeout TO 0")
main:    -> 0.0003s
main: -- add_index(:issues, [:project_id, :health_status, :created_at, :id], {:name=>"index_issues_on_project_id_health_status_created_at_id", :algorithm=>:concurrently})
main:    -> 0.0038s
main: -- execute("RESET statement_timeout")
main:    -> 0.0003s
main: == 20220831021358 AddIndexOnIssueHealthStatus: migrated (0.0291s) =============

down

$ brake db:migrate:down:main VERSION=20220831021358
main: == 20220831021358 AddIndexOnIssueHealthStatus: reverting ======================
main: -- transaction_open?()
main:    -> 0.0000s
main: -- index_exists?(:issues, [:project_id, :health_status, :created_at, :id], {:name=>"index_issues_on_project_id_health_status_created_at_id", :algorithm=>:concurrently})
main:    -> 0.0198s
main: -- execute("SET statement_timeout TO 0")
main:    -> 0.0003s
main: -- remove_index(:issues, {:name=>"index_issues_on_project_id_health_status_created_at_id", :algorithm=>:concurrently, :column=>[:project_id, :health_status, :created_at, :id]})
main:    -> 0.0187s
main: -- execute("RESET statement_timeout")
main:    -> 0.0003s
main: == 20220831021358 AddIndexOnIssueHealthStatus: reverted (0.0454s) =============

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #218711 (closed)