NO-JIRA: add singlearch-push-pipeline because Konflux complains about it missing

[jiridanek]

Description

https://github.com/red-hat-data-services/notebooks/runs/55408219047

There was an issue validating the commit: "cannot find referenced pipeline singlearch-push-pipeline. for a remote pipeline make sure to add it in the annotation"

How Has This Been Tested?

Self checklist (all need to be checked):

• Ensure that you have run make test (gmake on macOS) before asking for review
• Changes to everything except Dockerfile.konflux files should be done in odh/notebooks and automatically synced to rhds/notebooks. For Konflux-specific changes, modify Dockerfile.konflux files directly in rhds/notebooks as these require special attention in the downstream repository and flow to the upcoming RHOAI release.

Merge criteria:

• The commits are squashed in a cohesive manner and have meaningful messages.
• Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• The developer has manually tested the changes and verified that the changes work

[openshift-ci]

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