Add UTC timezone label to CRON trigger form (#14674)

- Added 'Cron will be triggered at UTC time' notice below trigger
interval dropdown
- Positioned correctly between dropdown and expression field to match
design
- Only shows when Custom CRON option is selected

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Co-authored-by: Félix Malfait <felix@twenty.com>
Co-authored-by: Félix Malfait <felix.malfait@gmail.com>

packages/twenty-server/package.json

@@ -96,7 +96,6 @@
     "cloudflare": "^4.5.0",
     "connect-redis": "^7.1.1",
     "cron-parser": "5.1.1",
-    "cron-validate": "1.4.5",
     "dataloader": "2.2.2",
     "date-fns": "2.30.0",
     "deep-equal": "2.2.3",