Allow limiting usable image remotes per project basis

[MrDaGree]

Required information

• Distribution: Ubuntu
• Distribution version: Jammy
• The output of "lxc info" or if that fails:
  • Kernel version: 5.15.0-69-generic
  • LXC version: 5.15
  • LXD version: 5.15
  • Storage backend in use: 5.15

Issue description

It would be desirable to be able to limit image remotes per project similarly to how we can already limit containers, cpu, etc. Being able to limit the image remotes by the project would allow for better security in terms of what users can launch in specific projects. If I have a project that all the images are supposed to be NIST compliant, I would like to force everyone on a server to use a specific remote when in that project to ensure that the images are what are deemed "complaint" on our side.

It would also be nice if project image remote limits could be exposed through the api so then it would be able to assist this lxd-ui request of additional remotes in the ui