Update jump_table map to modern BTF style map

[pinoOgni]

This PR just updates the jump_table map by moving from the legacy struct bpf_map_def to the BTF style one.

[marctc]

Nice catch!

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 43.42%. Comparing base (35e78af) to head (4e4c377).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1292      +/-   ##
==========================================
+ Coverage   43.35%   43.42%   +0.07%     
==========================================
  Files         305      304       -1     
  Lines       32816    32779      -37     
==========================================
+ Hits        14228    14235       +7     
+ Misses      17674    17627      -47     
- Partials      914      917       +3     

Flag	Coverage Δ
integration-test	21.10% <ø> (+<0.01%)	⬆️
integration-test-arm	0.00% <ø> (ø)
integration-test-vm-x86_64-5.15.152	0.00% <ø> (ø)
integration-test-vm-x86_64-6.10.6	0.00% <ø> (ø)
k8s-integration-test	2.37% <ø> (-0.01%)	⬇️
oats-test	0.00% <ø> (ø)
unittests	44.29% <ø> (+0.07%)	⬆️

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