No option to lock runner to current projects

Summary

When I create a project runner, I don't see an option to lock the runner to its assigned projects anymore when I edit it in Admin Area. This functionality still exists when I edit it from a project.

Steps to reproduce

1. Create a project runner
2. Go to admin > runners view
3. Edit the runner

Example Project

What is the current bug behavior?

No checkbox to lock to projects.

What is the expected correct behavior?

Checkbox under Configuration to lock to projects.

Relevant logs and/or screenshots

Output of checks

Results of GitLab environment info

Saw this on GDK - running 16.3.

Expand for output related to GitLab environment info

(For installations with omnibus-gitlab package run and paste the output of:
`sudo gitlab-rake gitlab:env:info`)

(For installations from source run and paste the output of:
`sudo -u git -H bundle exec rake gitlab:env:info RAILS_ENV=production`)

Results of GitLab application Check

Expand for output related to the GitLab application check

(For installations with omnibus-gitlab package run and paste the output of:
sudo gitlab-rake gitlab:check SANITIZE=true)
(For installations from source run and paste the output of:
sudo -u git -H bundle exec rake gitlab:check RAILS_ENV=production SANITIZE=true)
(we will only investigate if the tests are passing)

Possible fixes