82972: Add physical address prefill

[balexandr]

Add physical address to prefill

Summary

• Add form_address to model for prefill
• Update spec

Related issue(s)

• https://github.com/department-of-veterans-affairs/va.gov-team/issues/82972

Acceptance criteria

• [ ] Home address should also pull from user profile, in the same way that user's mailing address is pulled from their profile

Requested Feedback

[michaelclement]

Linking here for ZH tracking purposes: https://github.com/department-of-veterans-affairs/va.gov-team/issues/81646