Fix issue with nested SSL requests

[grcevski]

Apparently we didn't notice that the switch to use uprobes for uretprobes doesn't work for SSL_do_handshake. The handshake can jump instead of return and our return probe doesn't fire, causing a confusion on which connection the SSL belongs to and causing us to miss events.

I reproduced this with Python SSL -> Postgresql SSL.

I want to see if we can pass tests without this uprobe (it shouldn't be needed) but maybe we need another approach.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.13%. Comparing base (dd004f0) to head (9e050da).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1627      +/-   ##
==========================================
- Coverage   71.18%   71.13%   -0.06%     
==========================================
  Files         197      197              
  Lines       19881    19881              
==========================================
- Hits        14153    14142      -11     
- Misses       5044     5060      +16     
+ Partials      684      679       -5     

Flag	Coverage Δ
integration-test	52.84% <ø> (+0.27%)	⬆️
k8s-integration-test	53.84% <ø> (-0.10%)	⬇️
oats-test	34.64% <ø> (+0.18%)	⬆️
unittests	47.06% <ø> (+0.02%)	⬆️

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