Option for disabling automatic validation in Binder

[rolfsmeds]

Describe your motivation

In some cases (e.g. to prevent the height of a form from changing due to error messages appearing, or for a11y reasons) it would be desirable to disable the automatic validation of fields (whether on valuechange or any other field-level event), so that validation only happens when explicitly triggered in code, e.g. when a Submit button is clicked.

In these cases it would still be desirable to show validation error messages below the components, so removing error messages entirely would not be an adequate solution.

Describe the solution you'd like

Provide a method that disables automatic validation.

Additional context

Kind of related: vaadin/flow-components#4645