[FEATURE]: Allow custom naming convention for introspected schemas

### 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

Inside introspect-pg.ts:

```
export const paramNameFor = (name: string, schema?: string) => {
const schemaSuffix = schema && schema !== 'public' ? `In${schema.capitalise()}` : '';
return `${name}${schemaSuffix}`;
};
```

We have a hardcoded "InSchema" naming convention. Can we instead allow passing a map into the drizzle config to customize this?