Fix segfault in grpc upstream log reporting. (#7473)
Fix segfault in grpc upstream log reporting. (#7473)

StreamInfoImpl::downstream_ssl_info_ was left uninitilaized
in UpstreamRequest::stream_info_, and null check incorrectly
passed for a pointer pointing nowhere.

Risk Level: Low
Testing: Surprisingly, all tests use NiceMock for StreamInfo which returns initialized null pointer :)
Docs Changes: N/A
Release Notes: N/A

Signed-off-by: Alexey Baranov <b1c1d8736f20db3fb6c1c66bb1455ed43909f0d8@kotiki.cc>
envoyproxy/envoy-wasm,istio/envoy,eklitzke/envoy,eklitzke/envoy,lizan/envoy,envoyproxy/envoy,envoyproxy/envoy,eklitzke/envoy,envoyproxy/envoy-wasm,istio/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,lyft/envoy,lyft/envoy,eklitzke/envoy,eklitzke/envoy,envoyproxy/envoy,jrajahalme/envoy,envoyproxy/envoy-wasm,lizan/envoy,envoyproxy/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy,envoyproxy/envoy,lyft/envoy,jrajahalme/envoy,istio/envoy,lyft/envoy,lizan/envoy,jrajahalme/envoy,istio/envoy,lyft/envoy,envoyproxy/envoy-wasm,jrajahalme/envoy,eklitzke/envoy,envoyproxy/envoy-wasm,istio/envoy,jrajahalme/envoy,istio/envoy,envoyproxy/envoy,envoyproxy/envoy,jrajahalme/envoy,lyft/envoy,istio/envoy,lizan/envoy,lizan/envoy,envoyproxy/envoy,lizan/envoy