add tls options

Signed-off-by: zhengkezhou1 <madzhou1@gmail.com>

Author: zhengkezhou1

test/testdata/envoy.yaml

@@ -178,6 +178,8 @@ data:
               reuse_connection: true
               grpc_health_check:
                 service_name: "envoy.service.ext_proc.v3.ExternalProcessor"
+              tls_options:
+                alpn_protocols: ["h2"]  
           # This ensures that envoy accepts untrusted certificates. We tried to explicitly
           # set TrustChainVerification to ACCEPT_UNSTRUSTED, but that actually didn't work
           # and what worked is setting the common_tls_context to empty.