fix: Refactor error propagation

[JonathanWoollett-Light]

Changes

Refactors error propagation to avoid logging and printing misleading error messages.

Reason

#4176

License Acceptance

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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]

Codecov Report

Attention: 15 lines in your changes are missing coverage. Please review.

Comparison is base (bd55f7f) 83.02% compared to head (c5c5533) 83.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4180      +/-   ##
==========================================
- Coverage   83.02%   83.00%   -0.03%     
==========================================
  Files         222      222              
  Lines       28635    28642       +7     
==========================================
  Hits        23775    23775              
- Misses       4860     4867       +7     

Flag	Coverage Δ
4.14-c7g.metal	78.57% <0.00%> (-0.03%)	⬇️
4.14-m5d.metal	80.36% <0.00%> (-0.03%)	⬇️
4.14-m6a.metal	79.50% <0.00%> (-0.03%)	⬇️
4.14-m6g.metal	78.57% <0.00%> (-0.03%)	⬇️
4.14-m6i.metal	80.35% <0.00%> (-0.03%)	⬇️
5.10-c7g.metal	81.48% <0.00%> (-0.03%)	⬇️
5.10-m5d.metal	83.03% <0.00%> (-0.03%)	⬇️
5.10-m6a.metal	82.27% <0.00%> (-0.03%)	⬇️
5.10-m6g.metal	81.48% <0.00%> (-0.03%)	⬇️
5.10-m6i.metal	83.01% <0.00%> (-0.03%)	⬇️
6.1-c7g.metal	81.48% <0.00%> (-0.03%)	⬇️
6.1-m5d.metal	83.03% <0.00%> (-0.02%)	⬇️
6.1-m6a.metal	82.27% <0.00%> (-0.03%)	⬇️
6.1-m6g.metal	81.48% <0.00%> (-0.03%)	⬇️
6.1-m6i.metal	83.01% <0.00%> (-0.03%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
src/firecracker/src/main.rs	0.22% <0.00%> (-0.01%)	⬇️
src/firecracker/src/api_server_adapter.rs	0.00% <0.00%> (ø)

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