Factory type error message prints `type` instead of `StoreFactory`

### Describe the problem.

The error should print `StoreFactory.__name__` and not `type(StoreFactory).__name__`.

https://github.com/proxystore/proxystore/blob/493b151a9f838110d7d6227fd9f3fcf9fa5a1dea/proxystore/store/__init__.py#L64

### How did you install ProxyStore?

```console
pip install proxystore
```


### ProxyStore Version

v0.6.5

### Python Version

All

### OS and Platform

All