[CLIENT-3161] Add client config option to validate keys passed into client config and policy dictionaries

[juliannguyen4]

• Allow toggling config["validate_keys"] in the regression tests. The performance tests must have this disabled since we are simulating production workloads.

Manual testing:

• Code coverage shows all config keys are covered by tests

• There may be a performance impact when creating a new client instance with validate_keys set to True, but that setting can be disabled in a production system.

Extra changes:

• CI/CD: Build unoptimized client for running code coverage report for more accurate results
• CI/CD: prevent flake8 from scanning the wrong files in test/
• CLIENT-3493 client.{scan,query}apply()'s write policy will no longer be applied to aerospike{scan,query}_wait() as an info policy.

Valgrind shows no memory errors

TODO

• Verify all config keys are covered in array... done
• Transaction level policies do not raise an exception correctly.
• Other txn-level policies do not validate keys yet.

Notes (pls ignore):

• Idea: use hashmap to map keys to callbacks that set C client values

[codecov-commenter]

Codecov Report

❌ Patch coverage is 88.07339% with 26 lines in your changes missing coverage. Please review.
✅ Project coverage is 82.17%. Comparing base (f762c03) to head (a1a56fe).
⚠️ Report is 7 commits behind head on dev.

Files with missing lines	Patch %	Lines
src/main/client/type.c	85.29%	10 Missing ⚠️
src/main/aerospike.c	68.00%	8 Missing ⚠️
src/main/policy.c	74.19%	8 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev     #729      +/-   ##
==========================================
+ Coverage   82.03%   82.17%   +0.14%     
==========================================
  Files          99       99              
  Lines       14724    14179     -545     
==========================================
- Hits        12079    11652     -427     
+ Misses       2645     2527     -118     

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[juliannguyen4]

ensure no breaking changes