Fix: Path to sevctl was not from settings

[hoh]

No description provided.

[github-actions]

Summary:
The PR doesn't involve any significant changes or additions, it's mostly focused on small adjustments and refactoring. The PR is likely to have minimal impact on the codebase, and no risk of introducing new bugs.

Highlight:

• The PR modifies the configuration file (src/aleph/vm/conf.py) to include a new path for sevctl, which might be used for confidential computing.
• The PR modifies the supervisor's code (src/aleph/vm/orchestrator/supervisor.py) to store a sev_client singleton if confidential computing is enabled.

This PR is suitable for a 'BLUE' review, as it doesn't involve major changes or additions that could potentially introduce new bugs or have a high risk of introducing bugs.

Please review this PR carefully and provide feedback.

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[codecov]

Codecov Report

Attention: Patch coverage is 85.71429% with 2 lines in your changes missing coverage. Please review.

Project coverage is 59.72%. Comparing base (ed28be7) to head (98e4618).

Files	Patch %	Lines
src/aleph/vm/conf.py	0.00%	1 Missing ⚠️
src/aleph/vm/orchestrator/supervisor.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #637      +/-   ##
==========================================
+ Coverage   59.69%   59.72%   +0.03%     
==========================================
  Files          64       64              
  Lines        5438     5443       +5     
  Branches      591      591              
==========================================
+ Hits         3246     3251       +5     
  Misses       2048     2048              
  Partials      144      144              

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