Dockerfile.rocm.ubi: bump ROCm to 6.3.1, UBI base to 9.5

[dtrifiro]

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[openshift-ci]

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[openshift-ci]

@dtrifiro: The following tests 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/smoke-test	e1d7fc1	link	true	/test smoke-test
ci/prow/images	e1d7fc1	link	true	/test images

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