fix: preserve masked array in view

[flying-sheep]

• Closes #
• Tests added

• Release note not necessary because:

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.74%. Comparing base (2e12798) to head (2b4513c).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@                   Coverage Diff                    @@
##           template-sync-typing    #2582      +/-   ##
========================================================
+ Coverage                 85.70%   85.74%   +0.03%     
========================================================
  Files                        49       49              
  Lines                      8040     8054      +14     
========================================================
+ Hits                       6891     6906      +15     
+ Misses                     1149     1148       -1     

Files with missing lines	Coverage Δ
src/anndata/_core/views.py	87.23% <100.00%> (+1.04%)	⬆️