Weird error message for mixed exported/non-exported declarations under `isolatedModules`

```ts // @isolatedModules: true export function bar() { } interface bar { } export { bar as MyThing }; ``` **Expected**: I actually don't know 😄. I think it should just work though. **Actual**: Unclear error message In nightlies (3.8+), the message is currently ``` Re-exporting a type when the '--isolatedModules' flag is provided requires using 'export type'. ``` In 3.7.4 the message is still unclear. ``` Cannot re-export a type when the '--isolatedModules' flag is provided. ``` But `bar` is also a value! See also * https://github.com/microsoft/TypeScript/issues/32662 (which is about correcting the phrasing of the error) * https://github.com/microsoft/TypeScript/issues/32601 (which is about I guess giving the user better suggestions)