allow_requests_without_proxy_protocol feature ?

[chris93111]

We need to allow request without proxy protocol on envoy same as Haproxy with accept-proxy
the param is available on envoy with allow_requests_without_proxy_protocol
https://www.envoyproxy.io/docs/envoy/latest/api-v3/extensions/filters/listener/proxy_protocol/v3/proxy_protocol.proto#extensions-filters-listener-proxy-protocol-v3-proxyprotocol

PullRequest can be send with this feature ?

Tested with custom build, work perfectly with args --proxy-protocol-insecure

• Contour version: 1.30
• Kubernetes version: (use kubectl version): v1.31.7
• Kubernetes installer & version: OKD 4.18
• Cloud provider or hardware configuration: onpremise
• OS (e.g. from /etc/os-release): coreos