Updated to latest Rust stable

[JonathanWoollett-Light]

Reason for This PR

The current version of the Rust tool chain used in Firecracker is 1.52.0 this is over a year old and missing useful functionality.

Description of Changes

1. Updated Rust tool chain to latest stable release.
2. Implemented required fixes to satisfy rustc linting & clippy.
3. WIP Looking at failing jailer tests.

License Acceptance

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

PR Checklist

• [x] All commits in this PR are signed (git commit -s).
• [x] The issue which led to this PR has a clear conclusion.
• [x] This PR follows the solution outlined in the related issue.
• [x] The description of changes is clear and encompassing.
• [x] Any required documentation changes (code and docs) are included in this PR.
• [x] Any newly added unsafe code is properly documented.
• [x] Any API changes follow the Runbook for Firecracker API changes.
• [x] Any user-facing changes are mentioned in CHANGELOG.md.
• [x] All added/changed functionality is tested.

[dianpopa]

Did you remove the binding manually or re-run rust bindgen?

[dianpopa]

Do we maybe want to combine this rust update with ubuntu update? I am thinking about saving some devctr entries?

[JonathanWoollett-Light]

Did you remove the binding manually or re-run rust bindgen?

I manually removed some of the assertions within some of the tests which where flagged as UB.

Do we maybe want to combine this rust update with ubuntu update? I am thinking about saving some devctr entries?

I think in this case for making changes more incremental and faster it would be better to keep these separate.

[dianpopa]

Since the plan is to do this incrementally, would it make sense to close this?

Thanks!