[BUG]: Case preference not honored in column name

### Report hasn't been filed before.

- [x] I have verified that the bug I'm about to report hasn't been filed before.

### What version of `drizzle-orm` are you using?

0.44.7

### What version of `drizzle-kit` are you using?

0.31.5

### Other packages

_No response_

### Describe the Bug

```ts
await db
.insert(payments)
.values({
id: pId,
idInvoice: props.invoiceId,
idUser: props.userId,
amount: props.amount,
completedAt: new Date(),
status: "paid",
metadata: paymentMetadata,
remarks: props.remarks,
})
.onConflictDoUpdate({
target: [payments.id, payments.idInvoice],
set: {
status: sql.raw(`excluded.${payments.status.name}`),
completedAt: sql.raw(`excluded.${payments.completedAt.name}`),
metadata: sql.raw(`excluded.${payments.metadata.name}`),
remarks: sql.raw(`excluded.${payments.remarks.name}`),
amount: sql.raw(`excluded.${payments.amount.name}`),
},
});
```

In the above query, we get an error that says `column excluded.completedat does not exist`. In the drizzle config, we have set the casing preference to be snake_case so the expectation is that the name should get resolved to `excluded.completed_at` by `sql.raw()`.

There is no mention of this behavior in the docs.

For context, the project is a monorepo with typescript and uses Postgres with Neon under the hood.