refactor(daa): remove global daa test mode

[glevco]

Depends on #801

Motivation

This PR refactors the global daa TEST_MODE, allowing its simulator patch to be removed.

Acceptance Criteria

• Remove the global daa.TEST_MODE and daa._set_test_mode(), moving it to an attribute in the DAA class. Also, update respective usages.
• Create temporary DAA singleton to be used exclusively in the PeerId class. It should be removed in a future PR.
• Remove _set_test_mode() simulator patch.

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: 4 lines in your changes are missing coverage. Please review.

Comparison is base (2bcbc81) 85.11% compared to head (3926fa5) 85.12%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #802      +/-   ##
==========================================
+ Coverage   85.11%   85.12%   +0.01%     
==========================================
  Files         275      275              
  Lines       22514    22516       +2     
  Branches     3434     3434              
==========================================
+ Hits        19162    19167       +5     
+ Misses       2670     2667       -3     
  Partials      682      682              

Files	Coverage Δ
hathor/daa.py	95.53% <100.00%> (-0.04%)	⬇️
hathor/p2p/peer_id.py	97.22% <100.00%> (+0.03%)	⬆️
hathor/simulator/simulator.py	94.47% <100.00%> (-0.04%)	⬇️
hathor/builder/cli_builder.py	74.87% <42.85%> (+0.12%)	⬆️

... and 4 files with indirect coverage changes

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The base branch was changed.