Add support for record lookup when creating/editing records - and include polymorphic support

[paustint]

Describe the problem you are trying to solve

When editing/crediting a record and editing a lookup field, we should always show a record search.

Requirements:

1. Show record lookup search when editing a record
2. Add option to toggle between lookup and manual text entry
3. If relationship is polymorphic, then the user should be able to choose the target object
4. If relationship is polymorphic and there is existing data in the field, the correct object should be shown

Impacted areas:

1. Create/edit/Clone records
2. Data table inline editor (this already exists, but experience should be unified)
3. Bulk update record
4. (maybe?) Query filters