Use 6.1 guest kernel configs from AL

[bchalios]

Changes

Use AmazonLinux tailored guest configs for our 6.1 guest microVM kernels. Also, split the Kconfig for our CI kernels in a base part which will always be reflecting the AmazonLinux config and a set of patches that we apply on top of it before rebuilding our CI kernels. The patches live under resources/guest_configs/patches/.

Reason

AmazonLinux now ships a microVM kernels for 6.1. We want to build with the corresponding Kconfigs and keep track of our CI-specific changes in a form of patches.

License Acceptance

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license. For more information on following Developer Certificate of Origin and signing off your commits, please check CONTRIBUTING.md.

PR Checklist

• [ ] If a specific issue led to this PR, this PR closes the issue.
• [ ] The description of changes is clear and encompassing.
• [ ] Any required documentation changes (code and docs) are included in this PR.
• [ ] API changes follow the Runbook for Firecracker API changes.
• [ ] User-facing changes are mentioned in CHANGELOG.md.
• [ ] All added/changed functionality is tested.
• [ ] New TODOs link to an issue.
• [ ] Commits meet contribution quality standards.

---

• [ ] This functionality cannot be added in rust-vmm.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 84.34%. Comparing base (d008a8c) to head (3c3e074). Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4746   +/-   ##
=======================================
  Coverage   84.34%   84.34%           
=======================================
  Files         249      249           
  Lines       27461    27461           
=======================================
  Hits        23162    23162           
  Misses       4299     4299           

Flag	Coverage Δ
5.10-c5n.metal	84.57% <ø> (+<0.01%)	:arrow_up:
5.10-m5n.metal	84.55% <ø> (ø)
5.10-m6a.metal	83.84% <ø> (ø)
5.10-m6g.metal	80.91% <ø> (ø)
5.10-m6i.metal	84.54% <ø> (ø)
5.10-m7g.metal	80.91% <ø> (ø)
6.1-c5n.metal	84.56% <ø> (-0.01%)	:arrow_down:
6.1-m5n.metal	84.55% <ø> (ø)
6.1-m6a.metal	83.84% <ø> (-0.01%)	:arrow_down:
6.1-m6g.metal	80.91% <ø> (ø)
6.1-m6i.metal	84.54% <ø> (ø)
6.1-m7g.metal	80.91% <ø> (ø)

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