Issue #3496181 by jonathan1055, berdir, fjgarlin: Update CORE_PHP_MAX to 8.4

includes/include.drupalci.main.yml

@@ -1017,6 +1017,7 @@ nightwatch (max PHP version):
     - *nightwatch-tests-exist-rule
   needs:
     - 'composer (max PHP version)'
+  allow_failure: true
 
 nightwatch (previous minor):
   extends: nightwatch
@@ -1164,6 +1165,7 @@ phpunit (max PHP version):
     - *phpunit-tests-exist-rule
   needs:
     - 'composer (max PHP version)'
+  allow_failure: true
 
 phpunit (previous minor):
   extends: phpunit