[CLIENT-4702] Convert docstring code examples to doctest format and validate them

[juliannguyen4]

Extra Changes

• Add ability to copy code examples while also stripping any characters that aren't valid Python syntax

Trade-offs

• Code examples are harder to run because the Python REPL gives a syntax error when it encounters >>>. As a workaround, developers have to use IPython REPL with their specific desired version of Python to copy and run the code examples

https://aerospike-python-client--1047.org.readthedocs.build/en/1047/aerospike.html

TODO

• aerospike needs to be compiled before running doctest
• Copying doctest formatted code into Python REPL causes syntax errors related to >>> Moved to a different format than doctest
• Doctest teardown

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 83.85%. Comparing base (6570acb) to head (e36bc42).
⚠️ Report is 5 commits behind head on dev.

Files with missing lines	Patch %	Lines
src/main/client/operate.c	0.00%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #1047      +/-   ##
==========================================
- Coverage   83.89%   83.85%   -0.04%     
==========================================
  Files          99       99              
  Lines       14514    14520       +6     
==========================================
  Hits        12176    12176              
- Misses       2338     2344       +6     

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