Issue #2898691: Redesign the field type storage
- If using the select field with unlimited cardinality, added a way to pick up the existing serialized "platform_value" and adding them to the list to edit.
- As well as allow rendering multiple of the same social media link when using multiple cardinality.
- Increase the max length of the links to
2048
same as Drupal core's link field type.
Closes #2898691