[py] Removed desired capabilities from handshake code

[SinghHrmn]

Description

Fixes #10264

Motivation and Context

Python still sends both capabilities and desired capabilities to the driver, which can result in an OSS session that isn't properly supported any more.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• I have read the contributing document.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov-commenter]

Codecov Report

Merging #10494 (da113fa) into trunk (ed74210) will increase coverage by 0.00%.
The diff coverage is 0.00%.

@@           Coverage Diff           @@
##            trunk   #10494   +/-   ##
=======================================
  Coverage   45.04%   45.05%           
=======================================
  Files          85       85           
  Lines        5523     5522    -1     
  Branches      269      268    -1     
=======================================
  Hits         2488     2488           
  Misses       2766     2766           
+ Partials      269      268    -1     

Impacted Files	Coverage Δ
py/selenium/webdriver/remote/webdriver.py	39.75% <0.00%> (+0.06%)	⬆️

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[AutomatedTester]

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