fix: multi-arch-build failures due to ko build issue

[anithapriyanatarajan]

Changes

This pull request makes a minor update to the CI workflow to ensure consistent usage of the ko binary. Updated the build step to use the ko binary from the setup-ko action, preventing Go version mismatches during image resolution.

This relates to #3105

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Release Notes

NONE

/kind bug

[anithapriyanatarajan]

cc : @mbpavan

[jkhelil]

/approve

[tekton-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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[mbpavan]

/lgtm

[mbpavan]

/cherry-pick release-v0.78.x

[tekton-robot]

✅ Cherry-pick to release-v0.78.x successful!

A new pull request has been created to cherry-pick this change to release-v0.78.x.

Please review and merge the cherry-pick PR.

[vdemeester]

/cherry-pick release-v0.78.x

[tekton-robot]

✅ Cherry-pick to release-v0.78.x successful!

A new pull request has been created to cherry-pick this change to release-v0.78.x.

Please review and merge the cherry-pick PR.

[vdemeester]

! [remote rejected] cherry-pick-3106-to-release-v0.78.x -> cherry-pick-3106-to-release-v0.78.x (refusing to allow a Personal Access Token to create or update workflow .github/workflows/ci.yaml without workflow scope)

Ah can't work... But it should have failed, I need to fix that.

[vdemeester]

@mbpavan we will have to do the cherry-pick by hand 🙃