Add effective code lines to project graphs

What does this MR do and why?

Related to issue #1279 (closed) Add effective code lines to graphs api. So frontend can display effective code lines data.

{
  additions: 21
  author_email: "fatkodima123@gmail.com"
  author_name: "fatkodima"
  date: "2022-06-07"
  deletions: 1
  effective_additions: 17
  effective_deletions: 1
  id: "dd33effa46d3b8b3083b8f990df9eb1a3e708034"
}

Screenshots or screen recordings

How to set up and validate locally

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

1. Enable lines_of_code feature for a project

::Feature.enable(:lines_of_code, @project)

2. Visit project detail page, click Repository -> Contributors
3. Open the chrome console.
4. See the data.

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.