[CLIENT-2417] Replace partitions status dictionary with aerospike.PartitionsStatus class

[juliannguyen4]

…n python

• All the test cases in the test file test_scan_get_partitions_status.py are still in test_query_get_partitions_status.py, I believe
• Valgrind memory leaks for get_partitions_status are gone

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 0.00%. Comparing base (a46024d) to head (f480deb). Report is 5 commits behind head on dev.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## dev #683 +/- ## ========================================== - Coverage 80.79% 0.00% -80.80% ========================================== Files 102 45 -57 Lines 15173 7377 -7796 ========================================== - Hits 12259 0 -12259 - Misses 2914 7377 +4463 ```

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