Deprecate and Remove Version v1.12.0 - v1.12.5 AMP Extension Module Support for form Component and form Shortcode

Description

As we move up to version v1.13.0, we should focus on supporting that latest version. Hence, let's proceed to deprecate and to rescind the support for older version form shortcode's extended module support.

The Story Behind

Focus on moving forward.

Current Behavior

Support for older version is still available.

Expected Behavior

Support for older version is rescinded.

List out the MUST HAVE Personality

1. Seamless.
2. Enough time for people to migrate (6 months estimate).

Severity

Level of Security: Significant

Urgency

Level of Urgency: Code BLUE