Portfolio (django admin): Hide federal agency when the organization type is not federal

[zandercymatics]

Issue description

On the portfolio page, we dynamically hide the organization name field when the organization type is set to Federal.
For this ticket, we should do the inverse: hide the federal agency field when the organization type is not federal.

Acceptance criteria

• The federal agency field is hidden on the page when the organization_type is not federal.
• The federal agency field is set to non-federal agency on save if the organization_type is not federal.
• Ensure that the organization name is still visible when organization_type is not federal.

Additional context

In get-gov-admin.js, there is an existing IIFE called dynamicPortfolioFields. This may be a good spot for this change.

Links to other issues

No response

[zandercymatics]

@abroddrick Thoughts on the The federal agency field is set to non-federal agency on save if the organization_type is not federal. AC?