Replace the local registry image with the official multi-arch registry image

[Sachin-Itagi]

Fixes an issue where the image mirrored had a different digest and was causing a Manifest does not match provided manifest digest error when pulled using SHA value.

The PR replaces the old docker.io/ibmcom/registry-ppc64le:2.6.2.5 image with the official multi-arch image docker.io/library/registry:2

[ppc64le-cloud-bot]

Welcome @Sachin-Itagi! It looks like this is your first PR to ocp-power-automation/ocp4-upi-powervs 🎉

[ppc64le-cloud-bot]

Hi @Sachin-Itagi. Thanks for your PR.

I'm waiting for a ocp-power-automation 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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[yussufsh]

@Sachin-Itagi could you please create an issue first describing the problem?

[Sachin-Itagi]

@yussufsh Have created an issue #519 and shared the details and the resolution.

[yussufsh]

@Sachin-Itagi please fix the DCO error.

[Sachin-Itagi]

@yussufsh Fixed the DCO issue.

[yussufsh]

/lgtm

[ppc64le-cloud-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Sachin-Itagi, yussufsh

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