Add a new nvidia-gpu-services.target to ensure proper startup order

[KeithMnemonic]

This PR adds a new systemd target to ensure the proper startup order for nvidia-mig-manager. The current settings cause a cyclical dependency on systemd-resolved. This results in broken name resolution after the system is rebooted. The systemd-resolved service needs to be manually restarted for name resolution to work properly.

2024-04-22T17:39:34.983435-07:00 ubuntu kernel: systemd[1]: sysinit.target: Found ordering cycle on systemd-resolved.service/start
2024-04-22T17:39:34.983437-07:00 ubuntu kernel: systemd[1]: sysinit.target: Found dependency on nvidia-mig-manager.service/start
2024-04-22T17:39:34.983429-07:00 ubuntu sbkeysync[8851]:      from /usr/share/secureboot/updates/dbx/dbxupdate_x64.bin
2024-04-22T17:39:34.983444-07:00 ubuntu kernel: systemd[1]: sysinit.target: Found dependency on sysinit.target/start
2024-04-22T17:39:34.983443-07:00 ubuntu sbkeysync[8851]:     7fddfe06c44dc4302da54577353c18fdbe11b41cb3e6064ec1c116ee102fe080
2024-04-22T17:39:34.983464-07:00 ubuntu kernel: systemd[1]: sysinit.target: Job systemd-resolved.service/start deleted to break ordering cycle starting with sysinit.target/start

[KeithMnemonic]

@klueska Can you please assign some reviewers to this? I do not seem to have the correct permissions.

[klueska]

Is this still up to date based on the latest internal discussions?

[klueska]

Fixes: #103

[klueska]

Thanks for your patience on the round of reviews. Looks good now.

[klueska]

Ah, one caveat -- we can't merget this unless you sign your commit with:

Signed-off-by: Author Name <[email protected]>