Handle corrupted gzip streams in pcap/pcapng readers

[guedou]

This PR fixed the latest OSS-Fuzz finding, and aims to protect other calls to read()

[codecov]

Codecov Report

❌ Patch coverage is 75.00000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.14%. Comparing base (ac0ab2e) to head (f90e246).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
scapy/utils.py	75.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5215      +/-   ##
==========================================
+ Coverage   80.29%   81.14%   +0.84%     
==========================================
  Files         375      393      +18     
  Lines       97962    98325     +363     
==========================================
+ Hits        78656    79782    +1126     
+ Misses      19306    18543     -763     

Files with missing lines	Coverage Δ
scapy/utils.py	73.60% <75.00%> (-0.15%)	⬇️

... and 304 files with indirect coverage changes

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