Skip NO_AF_LOG_ADDR when target=mixed

[jtwb]

Fixes #324

Aerleon will issue a warning when it finds a term where none of the match conditions are relevant for the current address family (the warning is called NO_AF_LOG_ADDR internally). However the code is too eager to generate this warning since the parent filter may have target=mixed, which is a two-pass process that ultimately will render these terms, making the warning inaccurate and unnecessary. This change removes that warning when target=mixed.

[codecov]

Codecov Report

Patch coverage: 82.41% and project coverage change: -0.01% ⚠️

Comparison is base (484f6dc) 91.23% compared to head (bfd8a88) 91.23%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #329      +/-   ##
==========================================
- Coverage   91.23%   91.23%   -0.01%     
==========================================
  Files         102      102              
  Lines       22591    22664      +73     
  Branches     3385     3397      +12     
==========================================
+ Hits        20611    20677      +66     
- Misses       1284     1290       +6     
- Partials      696      697       +1     

Flag	Coverage Δ
tests	91.18% <82.41%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
aerleon/lib/packetfilter.py	82.63% <0.00%> (-0.58%)	⬇️
aerleon/lib/pcap.py	71.64% <0.00%> (-0.73%)	⬇️
aerleon/lib/cisco.py	89.24% <60.00%> (+0.53%)	⬆️
aerleon/lib/juniper.py	86.39% <66.66%> (-0.49%)	⬇️
aerleon/lib/arista_tp.py	93.24% <71.42%> (-0.48%)	⬇️
tests/regression/arista_tp/arista_tp_test.py	99.66% <100.00%> (+<0.01%)	⬆️
tests/regression/cisco/cisco_test.py	99.07% <100.00%> (+0.07%)	⬆️
tests/regression/juniper/juniper_test.py	99.78% <100.00%> (+<0.01%)	⬆️

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