[dotnet] Capture error output from selenium manager

[nvborisenko]

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Description

If selenium manager binary fails then user sees exception

OpenQA.Selenium.WebDriverException : Invalid response from process: selenium-manager/windows/selenium-manager.exe 12345
error: Found argument '12345' which wasn't expected, or isn't valid in this context

Usage: selenium-manager.exe [OPTIONS]

For more information try '--help'

Motivation and Context

Related to #11301

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.

[titusfortner]

Looks good, except we don't want the user actually seeing these error messages (yet), so we need to keep the try/catch in the DriverService.