Enable warnings for insecure forms (deprecated)

DEPRECATED: This policy is deprecated. It is currently supported but will become obsolete in a future release. This policy controls the handling of insecure forms (forms submitted over HTTP) embedded in secure (HTTPS) sites in the browser. If you enable this policy or don't set it, a full page warning is shown when an insecure form is submitted. Additionally, a warning bubble is shown next to the form fields when they're focused, and autofill will be disabled for those forms. If you disable this policy, warnings won't be shown for insecure forms, and autofill works normally. This policy may be removed as soon as Edge 132. The feature is enabled by default since Edge 131.