Fix callback issue preventFormSubmission (carbon-design-system#11023)

### Related Ticket(s)

[Noitce & Choice w3 Publisher](https://w3.ibm.com/w3publisher/urx/notice-and-choice-v23)

### Description

Notice & Choice is a legally required component to create a form where IBM collects its customer information.
This section shows the specific product's legal links, terms, and conditions. Along with this, it collects users' consent regarding communication preferences.

### Changelog

**New**

-  A new web component to create notice & choice user interface.

**Changed**

-  Fixed call-back function preventFormSubmission

**Removed**

- Postal option removed from new notice and choice version 

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packages/web-components/src/components/notice-choice/notice-choice.ts

@@ -197,6 +197,8 @@ class NoticeChoice extends StableSelectorMixin(LitElement) {
     if (this.ncData?.mandatoryCheckbox[this.country?.toLocaleLowerCase()]) {
       this.preventFormSubmission = true;
       this._onChange('preventFormSubmission', 'formSubmissionNo');
+    } else {
+      this._onChange('preventFormSubmission', 'formSubmissionYes');
     }
     /**
      * @description if the user already interacted with the checkboxes,