Input is required when validator is present, despite require: false

[japerry911]

Describe the issue

Input is required when validator is present, despite require: false

• *This occurs in Kestra Cloud

  - id: start_date
    type: STRING
    required: false
    validator: ^\d{4}-\d{2}-\d{2}$
    description: The start date to fetch data from Google Ads.

Error Message from UI:

Environment

• Kestra Version: 0.17.3
• Operating System (OS/Docker/Kubernetes): Cloud
• Java Version (if you don't run kestra in Docker): n/a