[1.35] upgrade envoy to v1.35.9#494

soloio-bulldozer[bot] merged 1 commit intorelease-v1.35solo-io/envoy-gloo:release-v1.35from

andyfong-release-v1.35.9-upgradesolo-io/envoy-gloo:andyfong-release-v1.35.9-upgradeCopy head branch name to clipboard