FE: Update `New Policy` page to conditionally render components based on policy type

Why are we doing this work

• The New Policy will be used to create many different types of policies, each with their own fields that need to be filled out
• This page should be updated to be able to conditionally render components based on the type of policy a user wants to create to keep our codebase as modular and DRY as possible, similar to how we utilize the security_dashboard_layout component to create the general layout for all of the security dashboards

Relevant links

Design: #267346[4b.createshedule_Updated.png]

Non-functional requirements

• Documentation
• Testing

Implementation plan

• frontend Update the policy_editor component to update what it renders based on the type of policy the user is creating