Enhance the kuma RetryPolicy with few more options which envoy supports already

[pranavkevadiya]

Description

Source code:
https://github.com/kumahq/kuma/blob/master/pkg/xds/envoy/listeners/v3/retry_configurer.go#L18

The code above sets the RetryPolicy field retry_on as
connect-failure,refused-stream,retriable-status-codes
These values however don't include retrying for a socket timeout or a closed connection. We have encountered such failures in our integration testing and we think a retry would have helped.

As per our analysis, if Kuma supports either of the following retry_on values to be propagated to the underlying envoy configuration, it should solve our purpose.

- reset
- connect-failure
- refused-stream
- http3-post-connect-failure
- retriable-status-codes

OR

- 5xx
- http3-post-connect-failure
- retriable-status-codes

Envoy configuration options for retry_on:
https://www.envoyproxy.io/docs/envoy/latest/configuration/http/http_filters/router_filter#x-envoy-retry-on

[johnharris85]

Was closed accidentally by merging the MADR, re-opened.