Remove static stream checks in QuicSession::OnRstStream() and let static sub-streams handle it. The advantage of having sub stream classes override rather than QuicStream base class sanity check is that HTTP/3 streams are now able to throw HTTP/3 specific errors. gfe-relnote: no behavior change. not protected. PiperOrigin-RevId: 299190484 Change-Id: Icaa957f91eba4acb3518515b75d205bc22001ddc