bpf: fix flaky http tests

[mmat11]

Tentative fix for #831

test-suite-python-aws-sqs.log

While investigating this log file, I noticed the last request buffer for sqs.DeleteQueue was being saved as a response buffer. Some code path is setting packetType to 2 (response) even when it's a request buffer. This PR tries avoiding storing the buffer as a response in the path where the buffer is appended

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 55.43%. Comparing base (3e887d4) to head (1744106).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #843   +/-   ##
=======================================
  Coverage   55.42%   55.43%           
=======================================
  Files         251      251           
  Lines       21400    21400           
=======================================
+ Hits        11861    11863    +2     
+ Misses       8731     8730    -1     
+ Partials      808      807    -1     

Flag	Coverage Δ
integration-test	23.22% <ø> (-0.05%)	⬇️
integration-test-arm	0.00% <ø> (ø)
integration-test-vm-${ARCH}-${KERNEL_VERSION}	0.00% <ø> (?)
k8s-integration-test	2.78% <ø> (ø)
oats-test	0.00% <ø> (ø)
unittests	46.54% <ø> (+<0.01%)	⬆️

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[grcevski]

Cool, let's see if it helps!