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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