[CLIENT-4033] Dev tests: remove wait_for_udf_to_exist()

[juliannguyen4]

Extra changes:

• Document that client.udf_put() waits for the udf module to be added to all server nodes
• Double check that C client docs is correct

Docs

https://aerospike-python-client--909.org.readthedocs.build/en/909/client.html#aerospike.Client.udf_put

Manual testing

• Build artifacts passes
• Stage tests pass
• New docs matches C client docs: https://aerospike.com/apidocs/c/d8/df8/group__udf__operations.html#gad2e052e19bc5ee1a08edec3b7397db33
• C client aerospike_udf_put_wait() implementation matches documentation

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.37%. Comparing base (f3721ad) to head (43a8420).
⚠️ Report is 3 commits behind head on dev.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev     #909   +/-   ##
=======================================
  Coverage   83.37%   83.37%           
=======================================
  Files          99       99           
  Lines       14389    14389           
=======================================
  Hits        11997    11997           
  Misses       2392     2392           

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[justinlee-aerospike]

Looks good