crypto/tls: apply QUIC session event flag to QUICResumeSession events

Go 1.23 adds two new events to QUICConns: QUICStoreSessionEvent and
QUICResumeSessionEvent. We added a QUICConfig.EnableStoreSessionEvent
flag to control whether the store-session event is provided or not,
because receiving this event requires additional action from the caller:
the session must be explicitly stored with QUICConn.StoreSession.

We did not add a control for whether the resume-session event is
provided, because this event requires no action and the caller is
expected to ignore unknown events.

However, we never documented the expectation that callers ignore
unknown events, and quic-go produces an error when receiving an
unexpected event. So change the EnableStoreSessionEvent flag to
apply to both new events.

Fixes #68124
For #63691

Change-Id: I84af487e52b3815f7b648e09884608f8915cd645
Reviewed-on: https://go-review.googlesource.com/c/go/+/594475
Reviewed-by: Marten Seemann <martenseemann@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Roland Shoemaker <roland@golang.org>

handshake_server_tls13.go

@@ -377,7 +377,7 @@ func (hs *serverHandshakeStateTLS13) checkForResumption() error {
 			continue
 		}
 
-		if c.quic != nil {
+		if c.quic != nil && c.quic.enableSessionEvents {
 			if err := c.quicResumeSession(sessionState); err != nil {
 				return err
 			}