VACMS-17962: Adds the form upload field to VA Forms.

[dsasser]

Description

Relates to #17962

Testing done

Tested that field exists on VA Form

Screenshots

QA steps

As a Content Admin

1. Visit node/add/va_form
   • Validate that the Form Upload field exists

Definition of Done

• Documentation has been updated, if applicable.
• Tests have been added if necessary.
• Automated tests have passed.
• Code Quality Tests have passed.
• Acceptance Criteria in related issue are met.
• Manual Code Review Approved.
• If there are field changes, front end output has been thoroughly checked.

[va-cms-bot]

va/tests/status-error:

entity_update

Title       Entity/field definitions

Severity    Error

Sid         2

Description The following changes were detected in the entity type and field definitions.

.... Content

         * The /node.field_datetime_range_timezone/ field needs to be updated.        
                                                                                      
        .... Paragraph                                                                
                                                                                      
         * The /paragraph.field_datetime_range_timezone/ field needs to be updated.   

Value       Mismatched entity and/or field definitions

[omahane]

Looks good. I also edited a pre-existing form and checked the element and saved the form without issue.