[rb] Add backtrace locations and cause to errors

rb/lib/selenium/webdriver/remote/response.rb

@@ -57,9 +57,9 @@ def assert_ok
         end
 
         def add_cause(ex, error, backtrace)
-          raise Error::WebDriverError, backtrace
-        rescue Error::WebDriverError
-          raise ex
+          cause = Error::WebDriverError.new(backtrace)
+          cause.set_backtrace(backtrace)
+          raise ex, cause: cause
         rescue Error.for_error(error)
           ex
         end

rb/sig/lib/selenium/webdriver/common/error.rbs

@@ -10,7 +10,7 @@ module Selenium
       URLS: Hash[Symbol, String]
 
       class WebDriverError < StandardError
-        def initialize: (?String msg) -> void
+        def initialize: (?String | Array[String] msg) -> void
 
         def class_name: -> Symbol?
       end