[py] Explicitly force timeout value to float in WebDriverWait. Fixes #8050

Author: AutomatedTester

py/selenium/webdriver/support/wait.py

@@ -43,7 +43,7 @@ def __init__(self, driver, timeout, poll_frequency=POLL_FREQUENCY, ignored_excep
                         until_not(lambda x: x.find_element_by_id("someId").is_displayed())
         """
         self._driver = driver
-        self._timeout = timeout
+        self._timeout = float(timeout)
         self._poll = poll_frequency
         # avoid the divide by zero
         if self._poll == 0: