test: add Playwright browser tests for CWS/AWS

[pxsit]

This is a draft for an example implementation of using playwright for browser based tests.
Need further development.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 21 lines in your changes missing coverage. Please review.
✅ Project coverage is 53.86%. Comparing base (101e372) to head (94f7845).
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
cmstestsuite/browser_tests/conftest.py	0.00%	13 Missing ⚠️
cmstestsuite/browser_tests/test_aws.py	0.00%	4 Missing ⚠️
cmstestsuite/browser_tests/test_cws.py	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1701      +/-   ##
==========================================
- Coverage   53.89%   53.86%   -0.04%     
==========================================
  Files         341      344       +3     
  Lines       27985    28006      +21     
==========================================
+ Hits        15083    15085       +2     
- Misses      12902    12921      +19     

Flag	Coverage Δ
functionaltests	0.00% <ø> (ø)
unittests	53.86% <0.00%> (-0.04%)	⬇️

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