We already support the model flag extension point in the dynamic plugin SDK (see https://github.com/openshift/dynamic-plugin-sdk/blob/main/packages/lib-core/src/extensions/feature-flags.ts#L14) Now we must populate the model feature flags in HAC Core via API discovery for HAC Dev and HAC BS.

See slack threads:
https://coreos.slack.com/archives/C02EQERSV3N/p1655831932631929

https://coreos.slack.com/archives/C02EQERSV3N/p1655387844714439?thread_ts=1655362979.611449&cid=C02EQERSV3N

Acceptance Criteria:

• HAC Core will utilize the model feature flag extension exposed by the core SDK here: https://github.com/openshift/dynamic-plugin-sdk/blob/main/packages/lib-core/src/extensions/feature-flags.ts#L14
• Using API discovery, when a CRD is detected on the cluster, a model feature flag extension will be populated for that CRD. For example, if the hac-bs integration controller CRD is present on the cluster, hac-core should flip the model feature flag for that CRD to indicate its presence. This is the same behavior as in OCP console.
• HAC plugins can then consume these flags to determine if they should enable/disable themselves