Add a basic noble migration check script

[legoktm]

Status

Ready for review

Description of Changes

Perform a number of checks to ensure the system is ready for the noble migration. The results are written to a JSON file in /etc/ that other things like the JI and the upgrade script itself can read from.

The script is run hourly on a systemd timer but can also be run interactively for administrators who want slightly more details.

Refs #7322.

Testing

How should the reviewer test this PR?

• staging CI passes
• visual review

Deployment

Any special considerations for deployment? n/a

Checklist

• Configuration tests pass

[legoktm]

I'm still thinking of a few more checks to add, but I think this is ready for review + merge and other checks can be added incrementally.

[legoktm]

I plan to port this to Rust based on #7332 (comment).

[legoktm]

Now that this is in Rust, need to do a few more cargo vet reviews:

recommended audits for safe-to-deploy:
    Command                                     Publisher      Used By                            Audit Size
    cargo vet diff zerofrom-derive 0.1.3 0.1.4  robertbastian  zerofrom                           5 files changed, 49 insertions(+), 43 deletions(-)
    cargo vet diff idna 1.0.2 1.0.3             valenting      url and sequoia-openpgp            7 files changed, 207 insertions(+), 208 deletions(-)
    cargo vet diff url 2.5.1 2.5.3              valenting      noble-migration                    12 files changed, 386 insertions(+), 92 deletions(-)
    cargo vet inspect stable_deref_trait 1.2.0  Storyyeller    yoke and icu_provider              484 lines
    cargo vet inspect idna_adapter 1.2.0        hsivonen       idna                               612 lines
    cargo vet inspect smallvec 1.8.0            mbrubeck       idna, icu_normalizer, and 1 other  3879 lines
      NOTE: mozilla trusts Matt Brubeck (mbrubeck) - consider cargo vet trust smallvec mbrubeck

estimated audit backlog: 5960 lines

The main new dependency triggering reviews is url, which pulls in idna.