Add GeckoDriver and EdgeDriver support to package:integration_test

[johnpryan]

It seems like ChromeDriver is the only member of the WebDriver family that package:integration_test supports. It would be great if we could support GeckoDriver and EdgeDriver too.

Steps to reproduce (GeckoDriver)

Install GeckoDriver and run in a separate shell or process:

geckodriver

output:

flutter drive \
  --driver=test_driver/integration_test.dart \
  --target=integration_test/app_test.dart \
  -d web-server
Running "flutter pub get" in integration_test_experiments...        590ms
Launching integration_test/app_test.dart on Web Server in debug mode...
Waiting for connection from debug service on Web Server...         16.8s
integration_test/app_test.dart is being served at http://localhost:59592
The web-server device requires the Dart Debug Chrome extension for debugging. Consider using the Chrome or
Edge devices for an improved development workflow.
Unable to start WebDriver Session for Flutter for Web testing.
Make sure you have the correct WebDriver Server running at 4444.
Make sure the WebDriver Server matches option --browser-name.
For more information see: https://flutter.dev/docs/testing/integration-tests#running-in-a-browser
InvalidArgumentException (400): chromeOptions is not the name of a known capability or extension capability

Steps to reproduce (EdgeDriver)

Install EdgeDriver and run in a separate shell or process:

msedgedriver --port=4444

output:

flutter drive \
  --driver=test_driver/integration_test.dart \
  --target=integration_test/app_test.dart \
  -d web-server
Running "flutter pub get" in integration_test_experiments...        592ms
Launching integration_test/app_test.dart on Web Server in debug mode...
Waiting for connection from debug service on Web Server...         16.9s
integration_test/app_test.dart is being served at http://localhost:59321
The web-server device requires the Dart Debug Chrome extension for debugging. Consider using the Chrome or
Edge devices for an improved development workflow.
Unable to start WebDriver Session for Flutter for Web testing.
Make sure you have the correct WebDriver Server running at 4444.
Make sure the WebDriver Server matches option --browser-name.
For more information see: https://flutter.dev/docs/testing/integration-tests#running-in-a-browser
InvalidArgumentException (400): invalid argument: unrecognized capability: chromeOptions

cc: @csells @dnfield

[DragonMoffon]

Has there been any progress towards this bug? This issue is still present on windows in 2023.