Add molecules for cryosym work

[garrettwrong]

Adds EMDB entries for molecules used by the cryosym project that were missing in ASPIRE-Python registry.

The ids and sym mapping were taken from the index page of that project. They are high order D and an I symmetry. It seems we already had the other volumes.

Downloaded all locally. No other code changes outside downloader. Will let the CI run then request review.

[codecov]

Codecov Report

❌ Patch coverage is 25.00000% with 21 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.55%. Comparing base (24ad316) to head (3c3ce9c).

Files with missing lines	Patch %	Lines
src/aspire/downloader/data_fetcher.py	25.00%	21 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1387      +/-   ##
===========================================
- Coverage    90.68%   90.55%   -0.13%     
===========================================
  Files          135      135              
  Lines        14663    14691      +28     
===========================================
+ Hits         13297    13304       +7     
- Misses        1366     1387      +21     

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