Keyboard issues

[jrandolf-2]

This is an umbrella issues to capture all current problems related to keyboard inputs:

• https://github.com/w3c/webdriver/issues/1741
• https://github.com/w3c/webdriver/issues/1747
• https://github.com/w3c/webdriver/issues/1733
• https://github.com/w3c/webdriver/pull/1740
• https://github.com/w3c/webdriver-bidi/issues/450
• https://github.com/web-platform-tests/wpt/pull/40992