SubscriptionFilterOptions support for StreamFilter and EventTypeFilter together

[cbgrasshopper]

When creating a subscription using server-side filtering, we have to choose between StreamFilter and EventTypeFilter in the SubscriptionFilterOptions. It would be good to support both, so I can do something like "subscribe to streams with such-and-such prefix and only give me events that match this Regex". Right now, I use the StreamFilter and then check the event types as they come, ignoring those I don't care about for my use case.

[xperiandri]

I support