[rust] Fix config setup in Selenium Manager

[bonigarcia]

Description

This PR fixes the logic for reading the configuration file and envs in Selenium Manager.

Motivation and Context

This PR should fix #12789 and #12782.

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

Patch and project coverage have no change.

Comparison is base (fb358a4) 56.53% compared to head (77acf32) 56.53%.
Report is 2 commits behind head on trunk.

❗ Current head 77acf32 differs from pull request most recent head 81962e2. Consider uploading reports for the commit 81962e2 to get more accurate results

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Additional details and impacted files

@@           Coverage Diff           @@
##            trunk   #12807   +/-   ##
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  Coverage   56.53%   56.53%           
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  Files          86       86           
  Lines        5253     5253           
  Branches      187      187           
=======================================
  Hits         2970     2970           
  Misses       2096     2096           
  Partials      187      187           

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[titusfortner]

Looks good, but I'm not merging any code until we get the CI happy again.

[vivin-joghee]

Issue #12788 is still not fixed in Selenium version 4.16.0 (selenium-manager 0.4.16). However, the comment in the issue #12788 says that it is fixed in selenium 4.13. Can you please help to double check. I’m using REDHAT 8.4.

[titusfortner]

@vivin-joghee can you paste the reproducible code, error/stack trace and Log output in that issue?