Remove unnecessary filtered connection info map

[grcevski]

This map was used only for HTTP and is a relic from the time when we used purely a socket filter for tracking the HTTP requests. Since we now use tcp_sendmsg and tcp_readmsg, the direction information doesn't have to be stored and it's easy to compute.

This change saves memory and it also reduces the likelihood of getting the direction wrong, especially on port reuse.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.46%. Comparing base (e95a7d4) to head (82d644a).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #963      +/-   ##
==========================================
+ Coverage   75.92%   79.46%   +3.54%     
==========================================
  Files         132      132              
  Lines       10378    10378              
==========================================
+ Hits         7879     8247     +368     
+ Misses       1967     1608     -359     
+ Partials      532      523       -9     

Flag	Coverage Δ
integration-test	54.50% <ø> (?)
k8s-integration-test	58.32% <ø> (-0.02%)	⬇️
oats-test	35.80% <ø> (ø)
unittests	47.36% <ø> (ø)

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[mariomac]

Good catch!