[FEATURE]: Accept callbacks in where clause when using update query

### Feature hasn't been suggested before.

- [X] I have verified this feature I'm about to request hasn't been suggested before.

### Describe the enhancement you want to request

This is how to update a user row stated in the documentation. However, if I'm using a monorepo project and I don't want to add drizzle-orm as another dependency again, I want to be able to provide where clause with callback functions similar to **select** query
### Update user row based on documentation
```typescript
await db.update(users)
.set({ updatedAt: sql`NOW()` })
.where(eq(users.name, 'Dan'));
```

### What I want to archive
```typescript
await db.update(users)
.set({ updatedAt: sql`NOW()` })
.where(userTables, { eq } => eq(users.name, 'Dan'));
```