Remove old contributors from OWNERS file, add new ones

[jotak]

We are refreshing the list of maintainers to keep it aligned with the current state of contributions, removing accounts who haven't contributed in the past year.

Thanks @mariomac @praveingk @shach33 @dushyantbehl @eranra @KalmanMeth and @ronensc for your contributions! You are of course welcome to come back if you wish :-)

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
Once this PR has been reviewed and has the lgtm label, please assign oliviercazade for approval. For more information see the Code Review Process.

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[openshift-ci]

@jotak: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/qe-e2e-tests	61d3477	link	false	/test qe-e2e-tests

Full PR test history. Your PR dashboard.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository. I understand the commands that are listed here.