[release-v0.18.4] Add all RHEL architectures

[yselkowitz]

• Build and release binaries for all RHEL architectures
• Package and serve binaries for all RHEL architectures

This rebases #524 to v0.18.4.

[openshift-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: yselkowitz
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[navidshaikh]

/retest

[navidshaikh]

/retest
/hold

[yselkowitz]

we're not going to make this branch either
/close

[openshift-ci-robot]

@yselkowitz: Closed this PR.

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In response to this:

we're not going to make this branch either
/close

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