set MaxQueueReqeusts=10000 in http_proxy (#2736)

Author: siarheivesialou

ydb/core/http_proxy/http_service.cpp

@@ -49,6 +49,7 @@ namespace NKikimr::NHttpProxy {
         if (cfg.UseSDK) {
             auto config = NYdb::TDriverConfig().SetNetworkThreadsNum(1)
                 .SetClientThreadsNum(1)
+                .SetMaxQueuedRequests(10000)
                 .SetGRpcKeepAlivePermitWithoutCalls(true)
                 .SetGRpcKeepAliveTimeout(TDuration::Seconds(90))
                 .SetDiscoveryMode(NYdb::EDiscoveryMode::Async);