Add API for listing audit events amazon_s3_configurations for a group

What does this MR do and why?

Add GraphQL API for listing audit events amazon_s3_configurations for a group.

Screenshots or screen recordings

Screenshots are required for UI changes, and strongly recommended for all other merge requests.

Before	After

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

1. Visit GraphiQL explorer https://gdk.test:3000/-/graphql-explorer
2. Create a new AuditEvents::AmazonS3Configuration by running the following mutation

mutation createAmazonS3Configuration {
  amazonS3ConfigurationCreate(
    input: {groupPath: "flightjs", awsRegion: "us-east-1", accessKeyXid: "AKIA1231dsdsdsdsds23", secretAccessKey: "TOPSECRET", bucketName: "TEST"}
  ) {
    amazonS3Configuration {
      id
      name
      accessKeyXid
      bucketName
      awsRegion
    }
    errors
  }
}

3. Run the following mutation to list AuditEvents::AmazonS3Configuration for a group.

query listAmazonS3Configuration {
  group(fullPath: "flightjs") {
    id
    amazonS3Configurations {
      nodes {
        id,
        name,
        accessKeyXid,
        awsRegion,
        bucketName
      }
    }
  }
}

4. You should see response similar to the one in the screenshot below

{
  "data": {
    "group": {
      "id": "gid://gitlab/Group/31",
      "amazonS3Configurations": {
        "nodes": [
          {
            "id": "gid://gitlab/AuditEvents::AmazonS3Configuration/9",
            "name": "AWS S3 Sandbox",
            "accessKeyXid": "AKIARANDOM123",
            "awsRegion": "ap-southeast-2",
            "bucketName": "audit-logs-gitlab"
          }
        ]
      }
    }
  }
}

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 #423229 (closed)