Add option to unset allow_other option for FUSE for target-mount

[Poeloe]

Fixes #683

[codecov]

Codecov Report

Attention: Patch coverage is 45.45455% with 6 lines in your changes missing coverage. Please review.

Project coverage is 75.61%. Comparing base (f2b2a24) to head (f69d81b).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
dissect/target/tools/mount.py	45.45%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #844      +/-   ##
==========================================
- Coverage   75.62%   75.61%   -0.01%     
==========================================
  Files         311      311              
  Lines       26544    26551       +7     
==========================================
+ Hits        20074    20077       +3     
- Misses       6470     6474       +4     

Flag	Coverage Δ
unittests	75.61% <45.45%> (-0.01%)	⬇️

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