refactor: migrate network collection to sysinfo

[ClementTsang]

Description

A description of the change, what it does, and why it was made. If relevant (such as any change that modifies the UI), please provide screenshots of the changes:

Remove the relevant heim feature/code and switch fully to sysinfo for network collection.

Issue

If applicable, what issue does this address?

Part of #812.

Testing

If relevant, please state how this was tested. All changes must be tested to work:

If this is a code change, please also indicate which platforms were tested:

• Windows
• macOS
• Linux

Checklist

If relevant, ensure the following have been met:

• Areas your change affects have been linted using rustfmt (cargo fmt)
• The change has been tested and doesn't appear to cause any unintended breakage
• Documentation has been added/updated if needed (README.md, help menu, doc pages, etc.)
• The pull request passes the provided CI pipeline
• There are no merge conflicts
• If relevant, new tests were added (don't worry too much about coverage)

[ClementTsang]

I had apparently done this migration before (#833) but then reverted it (d99f41f), and never changed it back after again... not sure if there was a reason. Double check on all platforms before merging this one!

[codecov]

Codecov Report

Patch coverage: 55.40% and project coverage change: +0.36 🎉

Comparison is base (caba611) 26.17% compared to head (a1ac11b) 26.54%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1041      +/-   ##
==========================================
+ Coverage   26.17%   26.54%   +0.36%     
==========================================
  Files          80       80              
  Lines       14622    14574      -48     
==========================================
+ Hits         3827     3868      +41     
+ Misses      10795    10706      -89     

Flag	Coverage Δ
macos-12	27.31% <55.40%> (+0.27%)	⬆️
ubuntu-latest	27.08% <55.40%> (+0.30%)	⬆️
windows-2019	27.02% <55.40%> (+0.28%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/app.rs	0.14% <ø> (+<0.01%)	⬆️
src/app/data_harvester.rs	0.00% <0.00%> (ø)
src/app/data_harvester/network.rs	20.00% <ø> (ø)
src/app/data_harvester/network/sysinfo.rs	0.00% <0.00%> (ø)
src/options.rs	75.47% <ø> (ø)
src/app/filter.rs	97.61% <97.61%> (ø)

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