feat(python): add TLS and auth args to getting-started examples

[saie-ch]

The Python getting-started examples connection settings has no way to configure TLS, authentication credentials.

What changed?

The producer and consumer examples only supported a basic --tcp-server-address argument.

Both examples now accept --tls, --tls-ca-file, --username, and --password arguments, and use IggyClient.from_connection_string() to build a connection string with optional TLS parameters.

Local Execution : Passed
Pre-commit hooks ran

• Tested locally against iggy server on 127.0.0.1:8090 without TLS:
  python examples/python/getting-started/producer.py --tcp-server-address 127.0.0.1:8090
  python examples/python/getting-started/consumer.py --tcp-server-address 127.0.0.1:8090
  Producer sent 5 batches of 10 messages (50 total), consumer consumed all 50 messages successfully.

• Tested on manged server with --tls , --tls-ca-file, username, password.
  examples/python/getting-started/producer.py
  --tls
  --tcp-server-address xxxxxxxx
  --username xxxx
  --password xxxxxx
  --tls-ca-file xxxxx

• Python SDK tests: 18/18 passed

[kparisa]

@saie-ch check comments, not blockers though.

[slbotbm]

Since we use the examples to validate the behaviour of the sdks, my concern is that currently only the "happy path" of the example working without tls is tested. If we are to merge the changes, I'd appreciate it if the example could be tested with the tls config in CI.

[slbotbm]

I thought about it, and instead of testing tls using the examples, it would be better to test as an integration test. @saie-ch would you be amenable to writing an integration test that will test tls?

[saie-ch]

@slbotbm Sure, I can write an integration test for TLS.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 68.35%. Comparing base (ad46a97) to head (2bb01fb).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #2754      +/-   ##
============================================
- Coverage     68.37%   68.35%   -0.02%     
  Complexity      739      739              
============================================
  Files          1053     1053              
  Lines         84717    84752      +35     
  Branches      61252    61297      +45     
============================================
+ Hits          57928    57936       +8     
- Misses        24415    24439      +24     
- Partials       2374     2377       +3     

Flag	Coverage Δ
csharp	67.43% <ø> (-0.19%)	⬇️
go	6.27% <ø> (ø)
java	54.83% <ø> (ø)
node	92.26% <ø> (-0.04%)	⬇️
python	81.57% <ø> (ø)
rust	70.06% <ø> (-0.03%)	⬇️

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