QUIC APL: Revise SSL_pending and SSL_has_pending handling for s_clien…

…t compat

Reviewed-by: Neil Horman <nhorman@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from #23995)

ssl/quic/quic_impl.c

@@ -2645,7 +2645,7 @@ int ossl_quic_write_flags(SSL *s, const void *buf, size_t len,
         if (!expect_quic(s, &ctx))
             return 0;
 
-        quic_lock_for_io(&ctx);
+        qctx_lock_for_io(&ctx);
     } else {
         if (!expect_quic_with_stream_lock(s, /*remote_init=*/0, /*io=*/1, &ctx))
             return 0;