feat: add --sysctl-init-file as cli command option

[alexruzenhack]

Acceptance criteria

• Add --sysctl-init-file CLI command option that should use the sysctl subsystem to configure the node.
• The configuration file is a txt file with a simple key value pair scheme.

Closes:

• Add optional argument --sysctl-config-file #684
• Test optional argument --sysctl-config-file #685

[codecov]

Codecov Report

Patch coverage: 87.97% and project coverage change: -0.12% ⚠️

Comparison is base (dbeaa9e) 84.75% compared to head (aadaf75) 84.64%.
Report is 5 commits behind head on master.

❗ Current head aadaf75 differs from pull request most recent head f6edfcf. Consider uploading reports for the commit f6edfcf to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #714      +/-   ##
==========================================
- Coverage   84.75%   84.64%   -0.12%     
==========================================
  Files         259      260       +1     
  Lines       21933    21951      +18     
  Branches     2964     2965       +1     
==========================================
- Hits        18590    18581       -9     
- Misses       2700     2722      +22     
- Partials      643      648       +5     

Files Changed	Coverage Δ
hathor/builder/sysctl_builder.py	41.66% <ø> (ø)
hathor/consensus/context.py	100.00% <ø> (ø)
hathor/indexes/rocksdb_height_index.py	94.11% <ø> (-0.12%)	⬇️
hathor/merged_mining/coordinator.py	34.02% <ø> (-0.19%)	⬇️
hathor/mining/ws.py	50.00% <ø> (-0.71%)	⬇️
hathor/sysctl/runner.py	90.00% <ø> (ø)
hathor/transaction/storage/tx_allow_scope.py	92.85% <ø> (-0.48%)	⬇️
hathor/sysctl/init_file_loader.py	33.33% <33.33%> (ø)
hathor/wallet/resources/thin_wallet/send_tokens.py	68.51% <40.00%> (ø)
hathor/consensus/block_consensus.py	94.36% <57.14%> (ø)
... and 33 more

... and 4 files with indirect coverage changes

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