Make FluxApproximator work with QBasedPolicy

[jeremiahpslewis]

• Drop legal_action_space_mask methods for MinimalActionSet case
• Clean up state syntax so FluxApproximator works with QBasedPolicy
• Use full state(env, Observation, DefaultPlayer) calls in RLEnvs

PR Checklist

• Update NEWS.md?
• Unit tests for all structs / functions?
• Integration and correctness tests using a simple env?
• PR Review?
• Add or update documentation?
• Write docstrings for new methods?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.57%. Comparing base (184d441) to head (86fb33d).
Report is 4 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #1075       +/-   ##
===========================================
+ Coverage   31.26%   81.57%   +50.31%     
===========================================
  Files          72        3       -69     
  Lines        2783       38     -2745     
===========================================
- Hits          870       31      -839     
+ Misses       1913        7     -1906     

see 73 files with indirect coverage changes

[jeremiahpslewis]

@HenriDeh Would love your review on this when you have a chance. :)

[HenriDeh]

See above

[jeremiahpslewis]

Thanks! Added an explanation.

[HenriDeh]

Thanks! Added an explanation.

I think you did not push it ?

[jeremiahpslewis]

Thanks! Added an explanation.

I think you did not push it ?

Sorry, was unclear. I meant a comment to your review question