ENH: Support alternative (U)F names for embedded file retrieval

[stefan6419846]

Closes #3070.

[codecov]

Codecov Report

Attention: Patch coverage is 97.05882% with 1 line in your changes missing coverage. Please review.

Project coverage is 96.36%. Comparing base (eec079d) to head (3fe42a4).

Files with missing lines	Patch %	Lines
pypdf/_doc_common.py	97.05%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3072   +/-   ##
=======================================
  Coverage   96.36%   96.36%           
=======================================
  Files          52       52           
  Lines        8769     8786   +17     
  Branches     1596     1604    +8     
=======================================
+ Hits         8450     8467   +17     
  Misses        191      191           
  Partials      128      128           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.