fix: quoting of QEMU driver boot args

[flxzt]

Description
This fixes the issue that boot arguments were passed unquoted to QEMU.

• PR has been tested

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 45.2%. Comparing base (d02396e) to head (4398e0d).
⚠️ Report is 4 commits behind head on master.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@          Coverage Diff           @@
##           master   #1812   +/-   ##
======================================
  Coverage    45.1%   45.2%           
======================================
  Files         173     173           
  Lines       13712   13721    +9     
======================================
+ Hits         6188    6203   +15     
+ Misses       7524    7518    -6     

Flag	Coverage Δ
3.10	45.2% <100.0%> (+<0.1%)	⬆️
3.11	45.2% <100.0%> (?)
3.12	45.2% <100.0%> (+<0.1%)	⬆️
3.13	45.1% <100.0%> (+<0.1%)	⬆️
3.14	45.1% <100.0%> (+<0.1%)	⬆️
3.9	45.2% <100.0%> (+<0.1%)	⬆️

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