Add rate limiting to projects members all API

What does this MR do and why?

Add rate limiting to projects members all API

Endpoint	Rate limit per user
GET /api/v4/projects/:id/members/all	60 requests per minute

Closes #578527

References

Screenshots or screen recordings

Before	After

How to set up and validate locally

1. In rails console

   pry(main)> user=User.first
   pry(main)> 59.times { Gitlab::ApplicationRateLimiter.throttled?(:project_members_api, scope: user) }
   => 59
   pry(main)> Gitlab::ApplicationRateLimiter.throttled?(:project_members_api, scope: user)
   => false
   pry(main)> 61.times { Gitlab::ApplicationRateLimiter.throttled?(:project_members_api, scope: user) }
   => 61
   pry(main)> Gitlab::ApplicationRateLimiter.throttled?(:project_members_api, scope: user)
   => true

MR acceptance checklist

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