Allow gitlab admins to create projects when "Default project creation protection" is set to noone

Summary

When "Default project creation protection" is set to noone, even gitlab instance admins cannot create projects.

Steps to reproduce

Set the setting "Default project creation protection" --> admin user cannot create projects

What is the current bug behavior?

Set the setting "Default project creation protection" --> admin user cannot create projects

What is the expected correct behavior?

Set the setting "Default project creation protection" --> admin user can create projects