ppc64le/multi-arch support for observability-operator

[jcho02]

Rebased from close #308

[openshift-ci]

Hi @jcho02. Thanks for your PR.

I'm waiting for a rhobs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[jcho02]

@danielmellado

[jan--f]

I'd prefer the image push stays in the push target. Is this needed to build the manifest?

[jcho02]

Yes if we're using Podman, we can't build and push in one command for Podman multi-arch builds like Docker

[jan--f]

Same question here as for the bundle image. Do we have to push images in the build step? If not strictly necessary I'd prefer to keep build and push separate.

[jan--f]

We keep the tool installs distro agnostic. and apt install won't work on my machine. Let's either install this like the other tools or add a gate that checks for presence and errors out if it's not in the PATH

[jan--f]

Is this actually used anywhere? If not the skopeo dependency can also be dropped iiuc.

[jcho02]

Its a bash script if users want to build all three operator, bundle, and catalog images in one command. I used it for dev purposes if you want to keep it, but its not necessary.

[openshift-ci]

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