Accessing member of instantiated template does not work. Doing so through an alias does work.

```cadl
model M {
x: string;
...T;
}

alias MEmpty = M<{}>;

model D {
d1: MEmpty.x; // <-- works!
d2: M<{}>.x; // <-- error token-expected ';' expected. (squiggly under '.')
}
```

[playground](https://cadlplayground.z22.web.core.windows.net/?c=bW9kZWwgTTxUPiB7CiAgeDogc3RyaW5nOwogIC4uLlQ7Cn0KCmFsaWFzIE1FbXB0eSA9IE08e30%2BOwoKxjxExTlkMTrHIS54xDxkMjrGKMQPfQ%3D%3D)