Added s390x support

[modassarrana89]

Updated build & push to use buildx for multi-arch image i.e. s390x & power.

build & push workflow will be able to generate multi-arch image . Tested the same with local repository

[modassarrana89]

Can someone please review & approved post that

[modassarrana89]

Tested by building multi-arch image by storing at local registry.

[modassarrana89]

@danielezonca @RobGeada please review.

[danielezonca]

Thanks @modassarrana89 for the PR

/lgtm

[github-actions]

PR image build and manifest generation completed successfully!

📦 PR image: quay.io/trustyai/trustyai-service-operator-ci:ee7410f4dee23e79f65aabda7e2e34dec7668b8e

🗂️ CI manifests

[ruivieira]

LGTM, thanks.

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: danielezonca, ruivieira

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[openshift-ci]

@modassarrana89: The following test 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/trustyai-service-operator-e2e	ee7410f	link	true	/test trustyai-service-operator-e2e

Full PR test history. Your PR dashboard.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository. I understand the commands that are listed here.

[modassarrana89]

@ruivieira Please merge the change