guivm: fix crash on lid close

[humaidq-tii]

Disables suspend inside gui-vm, as it causes qemu to segfault. Related to: https://gitlab.com/qemu-project/qemu/-/issues/2321

Also brings in fix in vsockproxy, which didn't used to handle signals gracefully, causing it to crash when the host is suspended.

Description of changes

• Configure logind not to suspend inside gui-vm.
• Update vsockproxy to include fix.
• Let vsockproxy systemd service restart always, so it is always available.

Fixes: SP-3466, and possibly SP-3464

Checklist for things done

• [x] Summary of the proposed changes in the PR description
• [x] More detailed description in the commit message(s)
• [x] Commits are squashed into relevant entities - avoid a lot of minimal dev time commits in the PR
• [x] Contribution guidelines followed
• [ ] Ghaf documentation updated with the commit - https://tiiuae.github.io/ghaf/
• [x] PR linked to architecture documentation and requirement(s) (ticket id)
• [x] Test procedure described (or includes tests). Select one or more:
  • [x] Tested on Lenovo X1 x86_64
  • [ ] Tested on Jetson Orin NX or AGX aarch64
  • [ ] Tested on Polarfire riscv64
• [ ] Author has run nix flake check --accept-flake-config and it passes
• [ ] All automatic Github Action checks pass - see actions
• [x] Author has added reviewers and removed PR draft status

Testing

• Boot the system, open any app VM window.
• Close the lid and open, as many times.
• Apps should still be running, interactive, networking available, other apps still launchable.
• Close lid, keep closed for more than 5 minutes, open lid. Apps should work (same as above).
• When the lid is closed, the system should be in suspend (pulsing red ThinkPad LED).
• If ping command is running, it would be paused due to suspend, and resume when lid is opened.
• Please be gentle with laptop during testing :)