Merge kserve and modelmesh deployment modes for odh-model-controller

[VedantMahabaleshwarkar]

Currently odh-model-controller is being deployed with the kserve-enabled=true flag for kserve reconciliation logic and kserve-enabled=false for modelmesh.
These flags are hardcoded in the manifests. This was done as it was not possible to deploy both kserve and modelmesh together previously. As this restriction no longer applies, we do not need the kserve-enabled flag anymore, and odh-model-controller will not need separate manifests for both components.

This is needed as ODH operator v2 is going to be pulling manifests directly from the component repo.