Replace ProtobufWkt::Message with correct namespace Protobuf::Message (#8982)
Replace ProtobufWkt::Message with correct namespace Protobuf::Message (#8982)

Signed-off-by: Yan Avlasov <afb66d2748ba0362a3ca849f18f55b7a7959dce3@google.com>
lyft/envoy,lyft/envoy,eklitzke/envoy,envoyproxy/envoy-wasm,lyft/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy-wasm,lizan/envoy,lizan/envoy,eklitzke/envoy,eklitzke/envoy,lizan/envoy,istio/envoy,lizan/envoy,jrajahalme/envoy,eklitzke/envoy,jrajahalme/envoy,envoyproxy/envoy,jrajahalme/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy,jrajahalme/envoy,istio/envoy,eklitzke/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,istio/envoy,istio/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy,eklitzke/envoy,envoyproxy/envoy-wasm,lyft/envoy,lizan/envoy,lyft/envoy,lyft/envoy,envoyproxy/envoy,istio/envoy,istio/envoy,istio/envoy,jrajahalme/envoy,jrajahalme/envoy,lizan/envoy