Deprecated envoy features

[jasmingacic]

We should keep an eye on this

[2022-09-13 00:39:31.143][7][warning][misc] [source/common/protobuf/message_validator_impl.cc:21] Deprecated field: type envoy.type.matcher.v3.RegexMatcher Using deprecated option 'envoy.type.matcher.v3.RegexMatcher.google_re2' from file regex.proto. This configuration will be removed from Envoy soon. Please see https://www.envoyproxy.io/docs/envoy/latest/version_history/version_history for details. If continued use of this field is absolutely necessary, see https://www.envoyproxy.io/docs/envoy/latest/configuration/operations/runtime#using-runtime-overrides-for-deprecated-features for how to apply a temporary and highly discouraged override.

[jasmingacic]

Upon examining this a little further I found out that config.route.v3.CorsPolicy is deprecated
See full information about it:
https://www.envoyproxy.io/docs/envoy/latest/api-v3/config/route/v3/route_components.proto#config-route-v3-corspolicy

Also there is more info here https://www.envoyproxy.io/docs/envoy/latest/version_history/v1.24/v1.24.0#deprecated

[jasmingacic]

And in 1.25 some of these will be removed too:
https://www.envoyproxy.io/docs/envoy/latest/version_history/v1.25/v1.25.0#removed-config-or-runtime