[SPARK-53986][PYTHON][SS][TESTS] Reorganize Python streaming TWS test

[huanliwang-db]

What changes were proposed in this pull request?

Reorganize the Python TWS tests:

• moving tws related tests to a new /streaming directory
• further split the Python TWS tests to smaller ones to speed up the CI

Why are the changes needed?

Code refactoring

Does this PR introduce any user-facing change?

No

How was this patch tested?

test is green

Was this patch authored or co-authored using generative AI tooling?

No

[zhengruifeng]

please fix the failure:

Run ./dev/check-license
Attempting to fetch rat
ERROR: Ignored 0 lines in your exclusion files as comments or empty lines.
Could not find Apache license headers in the following files:
 !????? /__w/spark/spark/python/__init__.py
Error: Process completed with exit code 1.

[zhengruifeng]

merged to master