/kind feature

Describe the solution you'd like
[A clear and concise description of what you want to happen.]
At the moment, there is no way to customize kserve configuration such as storage-initializer. If we update configmap, it will be rollback by odh operator.

We need a way to customize like what modelmesh did :
https://github.com/opendatahub-io/modelmesh-serving/tree/main/docs/configuration

Anything else you would like to add:
[Miscellaneous information that will assist in solving the issue.]

NOTE: This task is migrated from GitHub to Jira. See previous discussion on GH.