[CLIENT-3106] Fix reference count error caused by not properly incrementing reference count for Py_None object

[juliannguyen4]

None's reference count needs to be managed properly for Python 3.11 and lower

https://docs.python.org/3.11/c-api/none.html#c.Py_None
https://docs.python.org/3.12/c-api/none.html#c.Py_None

Massif memory usage seems ok: https://github.com/aerospike/aerospike-client-python/actions/runs/10887384965/job/30209613022
No memory errors from valgrind: https://github.com/aerospike/aerospike-client-python/actions/runs/10887382672

Build wheels macOS x86 tests fail fast even though I disabled that. Have to investigate later, but besides that, it should be fine

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.96%. Comparing base (d1e7bc2) to head (63260df).
Report is 1 commits behind head on dev.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev     #672   +/-   ##
=======================================
  Coverage   80.96%   80.96%           
=======================================
  Files         100      100           
  Lines       15130    15132    +2     
=======================================
+ Hits        12250    12252    +2     
  Misses       2880     2880           

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[justinlee-aerospike]

change looks good