Don't create files in /etc/iproute2 out of thin air

[Infinoid]

Fixes: #164

[Infinoid]

I was not able to run your unit tests; I get a timeout after 10 minutes. Please let me know if it breaks anything else.

I tested this using one of my own tests; it worked for me.

Before patch:

• no /etc/iproute2 directory
• run test (success)
• /etc/iproute2 exists
• /etc/iproute2/group file exists and is empty

After patch:

• no /etc/iproute2 directory
• run test (success)
• no /etc/iproute2 directory

[codecov]

Codecov Report

Attention: Patch coverage is 44.06780% with 33 lines in your changes missing coverage. Please review.

Project coverage is 50.64%. Comparing base (2575061) to head (7cd1773).
Report is 71 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/network_files.go	52.00%	14 Missing and 10 partials ⚠️
pkg/exec.go	0.00%	5 Missing ⚠️
internal/utils/utils.go	0.00%	1 Missing and 1 partial ⚠️
pkg/options/cmd/exec.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #165      +/-   ##
==========================================
+ Coverage   50.60%   50.64%   +0.03%     
==========================================
  Files          67       67              
  Lines        3140     3197      +57     
==========================================
+ Hits         1589     1619      +30     
- Misses       1336     1352      +16     
- Partials      215      226      +11     

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[stv0g]

Will be resolved with #215