quic_tserver_test: Raise the initial timeout limit

There were intermitten failures on the test occasionally and
1s initial limit might be too short.

Fixes openssl#22424

Reviewed-by: Paul Dale <pauli@openssl.org>
Reviewed-by: Hugo Landau <hlandau@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from openssl#22475)

test/quic_tserver_test.c

@@ -73,7 +73,7 @@ static int do_test(int use_thread_assist, int use_fake_time, int use_inject)
     int s_begin_write = 0;
     OSSL_TIME start_time;
     unsigned char alpn[] = { 8, 'o', 's', 's', 'l', 't', 'e', 's', 't' };
-    size_t limit_ms = 1000;
+    size_t limit_ms = 10000;
 
 #if defined(OPENSSL_NO_QUIC_THREAD_ASSIST)
     if (use_thread_assist) {