[BUG]: Changing a column type from `varchar` to `serial` causes incorrect migration sql to be generated

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

0.27.0

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

0.19.2

### Describe the Bug

Create a schema:
```typescript
export const users = pgTable("users", {
id: text("id").primaryKey(),
name: text("name").notNull(),
});
```

Generate and run migration.

Alter the schema:
```typescript
export const users = pgTable("users", {
id: serial("id").primaryKey(),
name: text("name").notNull(),
});
```
Generate the migration:
```sql
ALTER TABLE "users" ALTER COLUMN "id" SET DATA TYPE serial;--> statement-breakpoint
```
Run the migration

The following error occurs
```bash
PostgresError: type "serial" does not exist
```

### Expected behavior

The migration is successful

### Environment & setup

Linux, posgres 14