EPIC - SonataFlow Management Console on cluster improvements

[fantonangeli]

Currently, the SonataFlow Management Console attempts to trigger workflows using internal Endpoint URLs returned by the Data Index (DI). These URLs are not accessible from outside the cluster, leading to errors when users attempt to initiate workflows through the console.

• [SonataFlow Management Console] Make the console read-only incubator-kie-tools#2696
• [SonataFlow Management Console Image] Use mod_proxy to proxy request to the data-index  incubator-kie-tools#2695
• [SonataFlow Management Console Image] Use mod_proxy to proxy request to the openapi.json incubator-kie-tools#2712
• [SonataFlow Management Console] document the data-index will be exposed incubator-kie-kogito-docs#681
• [SonataFlow Management Console] remove Keycloak support incubator-kie-tools#2649