CI_REPOSITORY_URL is not reflecting runner-specific CLONE_URL

Summary

CI_REPOSITORY_URL as visible in the job is not reflecting runner-specific CLONE_URL option, making it unusable within job started by such runners

Steps to reproduce

1. run gitlab runner with --clone-url "http://zzz/" flag
2. print CI_REPOSITORY_URL

What is the current bug behavior?

CI_REPOSITORY_URL is NOT based on http://zzz/, therefore any attempt to use it is bound to fail, since any guaranteed way to contact Gitlab from that given runner is via URL specified in clone-url

What is the expected correct behavior?

CI_REPOSITORY_URL to start use value of runner's CLONE_URL , ie. https://gitlab-ci-token:token@zzzz/gitlab-examples/ci-debug-trace.git

Possible fixes

1. transform CI_REPOSITORY_URL on a runner side