wip: Update Dockerfile to use base-rhel9-minimal

[chiragkyal]

Description of the change:

Motivation for the change:

/hold

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@chiragkyal: 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/e2e-ansible	2ca1990	link	true	/test e2e-ansible

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