Misleading error message when device tests fail

[jamescrosswell]

Description

When the device tests fail, we always get the error message:

device-test.ps1: The property 'FullName' cannot be found on this object. Verify that the property exists.
Error: Process completed with exit code 1.

This is because we have a finally block in the script that executes (and fails) even when the device tests have not run successfully:

sentry-dotnet/scripts/device-test.ps1

Lines 87 to 108 in 863ee6a

	Install-XHarness
	Remove-Item -Recurse -Force test_output -ErrorAction SilentlyContinue
	try
	{
	if ($VerbosePreference)
	{
	$arguments += '-v'
	}
	xharness $group test $arguments --output-directory=test_output
	if ($LASTEXITCODE -ne 0)
	{
	throw 'xharness run failed with non-zero exit code'
	}
	}
	finally
	{
	if ($CI)
	{
	scripts/parse-xunit2-xml.ps1 (Get-Item ./test_output/*.xml).FullName | Out-File $env:GITHUB_STEP_SUMMARY
	}
	}

The script needs to be refactored to give a more useful error message when the tests fail.

[linear]

NET-588