[DISCUSSION] d/needrestart-cloud-init.conf: skip automated restarts of cloud-final

[blackboxsw]

Potential alternative to fixing upstream needrestart of downstream Ubuntu needrestart would be for cloud-init to deliver a conf file to skip automated restarts of cloud-final.service.

Proposed Commit Message

d/needrestart-cloud-init.conf: skip automated restarts of cloud-final

Install /etc/needrestart/conf.d/cloud-init.conf which will avoid automated needrestart of cloud-final.service when apt-get dist-upgrade also triggers a cloud-init package upgrade. The SIGTERM for cloud-final from needrestart prevents cloud-init from installing any deb packages or PPA source configuration after it invokes apt-get dist-upgrade leaving the system in a partially conigured state.

LP:# 2059337

Additional Context

Only Ubuntu Noble behaves this way per downstream Ubuntu modifications which put the needrestart mode into "autorestart" during non-interactive apt-get dist-upgrade calls that cloud-init executes.

https://bugs.launchpad.net/ubuntu/+source/needrestart/+bug/2059337

Test Steps

## Checklist
<!-- Go over all the following points, and put an `x` in all the boxes
that apply. -->
- [ ] My code follows the process laid out in [the documentation](https://cloudinit.readthedocs.io/en/latest/development/index.html)
- [ ] I have updated or added any [unit tests](https://cloudinit.readthedocs.io/en/latest/development/testing.html) accordingly
- [ ] I have updated or added any [documentation](https://cloudinit.readthedocs.io/en/latest/development/contribute_docs.html) accordingly

## Merge type

- [x] Squash merge using "Proposed Commit Message"
- [ ] Rebase and merge unique commits. Requires commit messages per-commit each referencing the pull request number (#<PR_NUM>)

[blackboxsw]

In discussion with Ubuntu Foundations team, we don't ideally want individual packages to be delivering their own /etc/needrestart/conf.d supplements as those decisions about conditions under-which a systemd service needs to receive may change over time and forcing a package maintainer to extend their own configuration supplements may pin a service to avoid needrestart cases that are actually generally required. Ideally those default service skips defined in $nrconf{override_rc} should be promoted to the package upstream to represent these known restart skips in one place so they can have better visibility and be better maintained/updated by the needrestart package itself as new features are developed to better handle restart triggering conditions.

As such, I'm closing this PR in favor of a merge request directly against Ubuntu's needrestart which will skip cloud-*.services cdhttps://code.launchpad.net/~chad.smith/ubuntu/+source/needrestart/+git/needrestart/+merge/463236