Add code owners entry for datadog extension (#5030)
Add code owners entry for datadog extension (#5030)

Signed-off-by: Caleb Gilmour <a8ec642e1b81824eb8e85ad599458e5460b3e6c9@datadoghq.com>
envoyproxy/envoy,istio/envoy,dnoe/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy,lizan/envoy,envoyproxy/envoy,istio/envoy,dnoe/envoy,jrajahalme/envoy,envoyproxy/envoy-wasm,lyft/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy,envoyproxy/envoy-wasm,istio/envoy,lyft/envoy,envoyproxy/envoy,lizan/envoy,lyft/envoy,envoyproxy/envoy,istio/envoy,envoyproxy/envoy,lyft/envoy,envoyproxy/envoy-wasm,dnoe/envoy,eklitzke/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,eklitzke/envoy,dnoe/envoy,eklitzke/envoy,envoyproxy/envoy,lizan/envoy,envoyproxy/envoy-wasm,jrajahalme/envoy,istio/envoy,lizan/envoy,lizan/envoy,istio/envoy,jrajahalme/envoy,eklitzke/envoy,envoyproxy/envoy-wasm,lyft/envoy,dnoe/envoy,lyft/envoy,eklitzke/envoy,jrajahalme/envoy,istio/envoy,envoyproxy/envoy,jrajahalme/envoy,eklitzke/envoy,lizan/envoy,jrajahalme/envoy