[rust] Fix webview2 support when browser path is set

[bonigarcia]

Description

This PR fixes the support for Edge's WebView2 in Selenium Manager when browser path is set.

Motivation and Context

Bug reported in #12738.

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

All modified and coverable lines are covered by tests ✅

Comparison is base (dde3eed) 57.53% compared to head (764d504) 57.53%.

❗ Current head 764d504 differs from pull request most recent head ad766dd. Consider uploading reports for the commit ad766dd to get more accurate results

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@           Coverage Diff           @@
##            trunk   #13204   +/-   ##
=======================================
  Coverage   57.53%   57.53%           
=======================================
  Files          86       86           
  Lines        5310     5310           
  Branches      221      221           
=======================================
  Hits         3055     3055           
  Misses       2034     2034           
  Partials      221      221           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.