refactor(settings): change HathorManager to use injected settings

[glevco]

Motivation

Continuing with the settings-related refactors, this PR updates HathorManager so it starts using injected settings, instead of global. This refactor is necessary for the Feature Activation mandatory signaling implementation.

Acceptance Criteria

• Add settings attribute to HathorManager, removing the module level settings
• Move DEFAULT_CAPABILITIES from module level to HathorManager.get_default_capabilities()
• Update Builder and CliBuilder accordingly

Checklist

• If you are requesting a merge into master, confirm this code is production-ready and can be included in future releases as soon as it gets merged

[codecov]

Codecov Report

Attention: 11 lines in your changes are missing coverage. Please review.

Comparison is base (c968aea) 84.64% compared to head (0a9b949) 84.69%.
Report is 2 commits behind head on master.

❗ Current head 0a9b949 differs from pull request most recent head 85a3bfc. Consider uploading reports for the commit 85a3bfc to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #787      +/-   ##
==========================================
+ Coverage   84.64%   84.69%   +0.04%     
==========================================
  Files         264      264              
  Lines       22024    22023       -1     
  Branches     3367     3368       +1     
==========================================
+ Hits        18643    18653      +10     
+ Misses       2727     2720       -7     
+ Partials      654      650       -4     

Files	Coverage Δ
hathor/builder/builder.py	91.02% <ø> (ø)
hathor/builder/cli_builder.py	74.48% <ø> (ø)
hathor/manager.py	81.37% <54.16%> (+0.19%)	⬆️

... and 6 files with indirect coverage changes

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