Cleanup Duplicate Code

[j-c-c]

Resolves #1233

Removes duplicate code found in both src/aspire/utils/coor_trans.py and src/aspire/utils/rotation.py.

Also, I refactored mean_aligned_angular_distance to use the alignment code which now resides in the Rotation class in a way to not change the API. It might make sense to move this function into the Rotation class as well, but it will change the API.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.64%. Comparing base (486bfbd) to head (e0ecc8e).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1280      +/-   ##
===========================================
+ Coverage    90.60%   90.64%   +0.03%     
===========================================
  Files          132      132              
  Lines        14181    14124      -57     
===========================================
- Hits         12849    12802      -47     
+ Misses        1332     1322      -10     

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[garrettwrong]

Looks good! Minor string update and quick questions, thanks.