Remove hiring halls from clan worlds

[Algebro7]

This PR updates the dynamic hiring hall formula to remove hiring halls for systems owned by the clans. This was due to a discussion in Discord where the consensus was that having hiring halls was inconsistent with clan lore.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 10.45%. Comparing base (1706145) to head (98ed721).
Report is 7 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #4961   +/-   ##
=========================================
  Coverage     10.44%   10.45%           
- Complexity     6004     6013    +9     
=========================================
  Files           951      951           
  Lines        132875   132877    +2     
  Branches      19329    19330    +1     
=========================================
+ Hits          13884    13891    +7     
+ Misses       117643   117637    -6     
- Partials       1348     1349    +1     

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