Missing error when reference directive file path doesn't exist

## Steps to reproduce

```ts
/// <reference path="notfound.d.ts" />
```

## Behavior with `typescript@5.8`
error:
```
D:\Throwaway\corsarepro>tsc
a.ts:1:22 - error TS6053: File 'D:/Throwaway/corsarepro/notfound.d.ts' not found.

1 /// <reference path="notfound.d.ts" />
                       ~~~~~~~~~~~~~
Found 1 error in a.ts:1
```

## Behavior with `tsgo`

No error issued