Implementing Multi-Arch Support for MCO with Multi-Base Builders

[dkhater-redhat]

Updated the Machine Config Operator’s build configuration to use both RHEL 9 and RHEL 8 Golang builders, aligning with ART tooling for consistent multi-architecture compatibility. No additional streams or members were needed beyond the dual-builder setup.

See this slack message for more info

[openshift-ci]

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[vfreex]

/hold I will need to check if we can use use ci-* images as the base images for production build. Will come back to you soon.

[ashwindasr]

/cherry-pick openshift-4.19

[openshift-cherrypick-robot]

@ashwindasr: once the present PR merges, I will cherry-pick it on top of openshift-4.19 in a new PR and assign it to you.

In response to this:

/cherry-pick openshift-4.19

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[joepvd]

Context, we're trying to figure out how to make the switch globally in 4.19, here is an option: #5618
Once we have clarity there, we can make things work for 4.18.

[dkhater-redhat]

gotcha- let me know if you need me to make any changes from my end. thanks for keeping me posted!