[BUG]: Empty findFirst and findMany queries returns unknown types with strictNullChecks set to false

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

0.29.2

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

0.20.9

### Describe the Bug

In my schema, I have this:
```ts
export const table1 = pgTable('Table1', {
id: text('id')
.primaryKey()
.$defaultFn(() => sql`gen_random_uuid()::text`)
.notNull(),
someField: boolean('someField').default(false).notNull()
});
```
If I run this query: `const item = await db.query.table.findFirst();`, the type of `item` is `{ [x: string]: unknown; }`. If I add a condition to the find many (any where condition), I get the proper return type of `table1`.

### Expected behavior

`strictNullChecks` is set to false and doesn't break types.

### Environment & setup

[Reproduction repository](https://github.com/jakeleventhal/drizzle-type-error-repro/tree/master)