Add the ability for the Database Picker fields to show on the Service Desk Portal

As an SR User
I want to have DB picker in the Service Desk Portal
so that I xxx

Acceptance Criteria

• Users should be able to add a DB Picker field in the Service Desk Portal

Stretch Goal

• Script Fields to be added to Service Desk Portal

Context: Our Database Picker fields do not currently show as available fields on the customer portal Request page because Jira does not support the "scripted field" field type for display on the portal. I explain this more here.