Update tekton configuration and add a new dockerfile for downstream build

[Mangaal]

What type of PR is this?

Update tekton configuration and add a new dockerfile for downstream build

/kind enhancement

What does this PR do / why we need it:

Have you updated the necessary documentation?

• Documentation update is required by this PR.
• Documentation has been updated.

Which issue(s) this PR fixes:

Fixes #?

How to test changes / Special notes to the reviewer:

[openshift-ci]

Hi @Mangaal. Thanks for your PR.

I'm waiting for a redhat-developer 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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[svghadi]

/ok-to-test

[svghadi]

@Mangaal - Can you enable multi-platform builds? You need to update build-platforms parma in tekton configs.

  - name: build-platforms
    value:
    - linux/x86_64
    - linux/arm64
    - linux/ppc64le
    - linux/s390x

[svghadi]

Also enable hermetic builds

• https://konflux-ci.dev/docs/how-tos/configuring/hermetic-builds/
• https://konflux-ci.dev/docs/how-tos/configuring/prefetching-dependencies/#gomod

[svghadi]

/lgtm

[svghadi]

/lgtm

[svghadi]

/approve

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: svghadi
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