feat(ui): add support for disabling join field row types (#12738)

### What?
This PR adds a new `admin.disableRowTypes` config to `'join'` fields
which hides the `"Type"` column from the relationship table.

### Why?
While the collection type column _can be_ helpful for providing
information, it's not always necessary and can sometimes be redundant
when the field only has a singular relationTo. Hiding it can be helpful
by removing visual noise and providing editors the data directly.

### How?
By threading `admin.disableRowTypes` directly to the `getTableState`
function of the `RelationshipTable` component.

**With row types** (via `admin.disableRowTypes: false | undefined` OR
default for polymorphic):

![image](https://github.com/user-attachments/assets/22b55477-cf56-4b0e-a845-e6f2b39efe3b)

**Without row types** (default for monomorphic):

![image](https://github.com/user-attachments/assets/3a2bb0ba-2d5e-4299-8689-249b2d3fefe2)

packages/payload/src/fields/config/types.ts

@@ -1628,6 +1628,7 @@ export type JoinField = {
     } & Admin['components']
     defaultColumns?: string[]
     disableBulkEdit?: never
+    disableRowTypes?: boolean
     readOnly?: never
   } & Admin
   /**
@@ -1679,8 +1680,11 @@ export type JoinField = {
 
 export type JoinFieldClient = {
   admin?: AdminClient &
-    // @ts-expect-error - vestiges of when tsconfig was not strict. Feel free to improve
-    Pick<JoinField['admin'], 'allowCreate' | 'defaultColumns' | 'disableBulkEdit' | 'readOnly'>
+    Pick<
+      JoinField['admin'],
+      // @ts-expect-error - vestiges of when tsconfig was not strict. Feel free to improve
+      'allowCreate' | 'defaultColumns' | 'disableBulkEdit' | 'disableRowTypes' | 'readOnly'
+    >
 } & { targetField: Pick<RelationshipFieldClient, 'relationTo'> } & FieldBaseClient &
   Pick<
     JoinField,