[model-controller] Implement controller for MR and serving interactions

[lampajr]

Is your feature request related to a problem? Please describe.
Followup of https://github.com/opendatahub-io/model-registry/issues/104: implement the described flow diagram.
Initially this implemantion could be placed in the odh-model-controller repository.

Describe the solution you'd like
Implement the logic described in this diagram, focusing on the odh-model-controller actor specified in the sequence diagram.

Describe alternatives you've considered
n/a

Additional context
Splitting this issue into multiple tasks:

• https://github.com/opendatahub-io/model-registry/issues/174
• https://github.com/opendatahub-io/model-registry/issues/175