Appium's base-driver had no dedicated ProtocolError subclass for
the W3C WebDriver 'no such shadow root' error. Every such response
from an underlying browser (the GetShadowRoot command against an
element whose shadow DOM is absent) fell through the
w3cErrorCodeMap lookup to UnknownError, making client-side error
handling (Selenium's NoSuchShadowRootException in particular)
unreachable.
Add NoSuchShadowRootError with error='no such shadow root' /
w3cStatus=404 / code=65, register it in the errors map so
errorFromW3CJsonCode returns it, and extend the existing
errors.spec table-tests to lock the new mapping.
Fixes#22209
Signed-off-by: SAY-5 <say.apm35@gmail.com>