LG-7832: Preserve State ID and Address form data on invalid submissions

[NavaTim]

🎫 Ticket

• LG-7832

🛠 Summary of changes

• Preserve State ID and Address form data on invalid submissions
• Form submission responses will include errors

📜 Testing Plan

Provide a checklist of steps to confirm the changes.

• Complete IPP flow up until state ID form
• Disable JavaScript and refresh
• Use the dev tools to remove the required attribute from the First name field
• Submit the form without filling out the First name
• Verify that form re-renders with an error for the First name field
• Enter valid state ID data and repeat the above for the address form

Note: Previous behavior was to re-render the same form with no error and with all fields blank.

[jmhooper]

This looks like it should work. I think the fact that the forms get memoized is not very obvious to people implementing steps. That is, unfortunately however, the nature of the flow state machine and the reason we are discarding it.

I will say, related to it be non-obvious, I think we could do a lot of work on the commit message here. Doing so will help future readers understand what this change is doing and what its purpose is. Please make sure to write a descriptive message when you merge that provides context for why this change is necessary and describes how it solves that problem.

[NavaTim]

@jmhooper I included details about how and why this change works in the squash commit message.