OSS-Fuzz: Add new fuzzer targets read processing

[arthurscchan]

This PR adds a new OSS-Fuzz fuzzer targets the read process of the libvshadow, bundled in the libyal project from OSS-Fuzz.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 31.06%. Comparing base (8cd9228) to head (06d3802).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #33      +/-   ##
==========================================
+ Coverage   30.76%   31.06%   +0.30%     
==========================================
  Files          28       28              
  Lines        5312     5251      -61     
  Branches     1212     1212              
==========================================
- Hits         1634     1631       -3     
+ Misses       3186     3128      -58     
  Partials      492      492              

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[joachimmetz]

Thanks for the proposed changes, but closing in favor of a store fuzz target bb16cf9