Add OWNERS file

[vaibhavjainwiz]

Description

How Has This Been Tested?

Merge criteria:

• [ ] The commits are squashed in a cohesive manner and have meaningful messages.
• [ ] Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• [ ] The developer has manually tested the changes and verified that the changes work

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: vaibhavjainwiz

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Needs approval from an approver in each of these files: - ~~[OWNERS](https://github.com/opendatahub-io/caikit-nlp/blob/main/OWNERS)~~ [vaibhavjainwiz] Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment