fix(drizzle): equals polymorphic querying with object notation (#8316)

Previously, this wasn't valid in Postgres / SQLite:
```ts
const res = await payload.find({
  collection: 'polymorphic-relationships',
  where: {
    polymorphic: {
      equals: {
        relationTo: 'movies',
        value: movie.id,
      },
    },
  },
})
```

Now it works and actually in more performant way than this:
```ts
const res = await payload.find({
  collection: 'polymorphic-relationships',
  where: {
    and: [
      {
        'polymorphic.relationTo': {
          equals: 'movies',
        },
      },
      {
        'polymorphic.value': {
          equals: 'movies',
        },
      },
    ],
  },
})
``` 

Why? Because with the object notation, the output SQL is: `movies_id =
1` - checks exactly 1 column in the `*_rels` table, while with the
separate query by `relationTo` and `value` we need to check against
_each_ possible relationship collection with OR.

test/_community/payload-types.ts

@@ -186,12 +186,12 @@ export interface PayloadLockedDocument {
         relationTo: 'users';
         value: string | User;
       } | null);
+  editedAt?: string | null;
   globalSlug?: string | null;
   user: {
     relationTo: 'users';
     value: string | User;
   };
-  editedAt?: string | null;
   updatedAt: string;
   createdAt: string;
 }