fix(apt): disable debian frontend when running apt commands

[reubenmiller]

Proposed changes

Disable debian frontends whilst running apt commands in tedge-apt-plugin

This avoids packages failing due to interactive frontend.

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Improvement (general improvements like code refactoring that doesn't explicitly fix a bug or add any new functionality)
• Documentation Update (if none of the other choices apply)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Paste Link to the issue

#2671

Checklist

• I have read the CONTRIBUTING doc
• I have signed the CLA (in all commits with git commit -s)
• I ran cargo fmt as mentioned in CODING_GUIDELINES
• I used cargo clippy as mentioned in CODING_GUIDELINES
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

Further comments

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (a1c8bda) 75.9% compared to head (ca154f9) 76.0%.
Report is 1 commits behind head on main.

Additional details and impacted files

Files	Coverage Δ
plugins/tedge_apt_plugin/src/lib.rs	25.6% <0.0%> (-0.2%)	⬇️

... and 5 files with indirect coverage changes

[github-actions]

Robot Results

✅ Passed	❌ Failed	⏭️ Skipped	Total	Pass %	⏱️ Duration
390	0	3	390	100	52m25.716s

[didier-wenzek]

Approved