Add filter_enabled flag to RBAC filter

[LaureHalabi]

Title: Add filter_enabled flag to RBAC filter

Description:
Currently, Envoy's RBAC filter does not have a filter_enabled field that other http filters have (e.g. localRateLimit and extAuth). Adding this flag to the RBAC filter would provide flexibility in enabling or disabling the filter at runtime based on runtime settings allowing for dynamic management of filter behavior without requiring a full configuration deployment.

I can prepare a patch for this if it sounds reasonable.

[mattklein123]

I believe this is supported generically now: https://www.envoyproxy.io/docs/envoy/latest/intro/arch_overview/http/http_filters#route-based-filter-chain

cc @wbpcode