Attempt fix missing http calls

[grcevski]

Based on some recent logs of Java running on kernels 5.10 and 5.15 we see missing prints for the kretprobes of tcp_recvmsg. Some succeed on rare occasions, but most don't run.

This PR:

• Fixes the socket filter backup path
• Attempts to handle the case where buffers may be read incompletely in tcp_recvmsg.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.84%. Comparing base (ef14616) to head (5d268a1).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1092      +/-   ##
==========================================
+ Coverage   70.58%   73.84%   +3.26%     
==========================================
  Files         172      172              
  Lines       13066    13066              
==========================================
+ Hits         9222     9649     +427     
+ Misses       3280     2869     -411     
+ Partials      564      548      -16     

Flag	Coverage Δ
integration-test	51.03% <ø> (?)
k8s-integration-test	53.28% <ø> (+0.39%)	⬆️
oats-test	33.66% <ø> (+0.20%)	⬆️
unittests	45.66% <ø> (+0.05%)	⬆️

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[rafaelroquetto]

Gnarly!