Update as per the new selenium

This is a change base on the below documentation

https://www.selenium.dev/blog/2023/headless-is-going-away/

Author: ale-sanchez-g

tests/conftest.py

@@ -131,7 +131,7 @@ def webdriver(headless: bool):
   """
 
   options = ChromeOptions()
-  options.headless = headless
+  options.add_argument("--headless=new")
 
   if USE_EXECUTION_CLOUD:
     driver = Remote(