Removed the sync-downstream.yaml GHA definition.

[jstourac]

We replaced this GHA by the standardized devops infrastructure GHA:

• https://github.com/red-hat-data-services/rhods-devops-infra/blob/main/.github/workflows/upstream-auto-merge.yaml

https://issues.redhat.com/browse/RHOAIENG-24972

[openshift-ci]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[atheo89]

/lgtm

[jstourac]

/override ci/prow/images
/approve

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jstourac

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• OWNERS [jstourac]

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[openshift-ci]

@jstourac: Overrode contexts on behalf of jstourac: ci/prow/images

In response to this:

/override ci/prow/images
/approve

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