Feature/proxmox implementation

[otnxSl]

Added Support for systems running Proxmox Virtual Environment using the default ext4 filesystem configuration.

[DissectBot]

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[Horofic]

Hey @otnxSl. Thank you for your contribution, looks like quite some work went into this! Please allow us some time to start the review process on this PR. We try to get back to you as soon as possible!

[otnxSl]

@DissectBot agree

[Schamper]

Depends on #832 for the /etc/pve/qemu-server symlink to function.

[codecov]

Codecov Report

Attention: Patch coverage is 49.03226% with 79 lines in your changes missing coverage. Please review.

Project coverage is 75.35%. Comparing base (6968253) to head (66dcefb).

Files	Patch %	Lines
...target/plugins/os/unix/linux/debian/proxmox/_os.py	43.24%	42 Missing ⚠️
dissect/target/loaders/proxmox.py	29.26%	29 Missing ⚠️
.../target/plugins/os/unix/linux/debian/proxmox/vm.py	69.23%	4 Missing ⚠️
dissect/target/plugins/child/proxmox.py	83.33%	2 Missing ⚠️
dissect/target/plugins/os/unix/_os.py	66.66%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #745      +/-   ##
==========================================
- Coverage   75.51%   75.35%   -0.17%     
==========================================
  Files         305      309       +4     
  Lines       26348    26496     +148     
==========================================
+ Hits        19897    19966      +69     
- Misses       6451     6530      +79     

Flag	Coverage Δ
unittests	75.35% <49.03%> (-0.17%)	⬇️

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[Schamper]

Test file uploaded in a separate PR because of annoying GitHub bugs with LFS on PR branches: #833

[Schamper]

Will be continued at #837