Fix upstream builds

[jotak]

See https://stackoverflow.com/questions/75521775/buildx-docker-image-claims-to-be-a-manifest-list

Fixes errors like:

Error response from daemon: No such image: quay.io/netobserv/flowlogs-pipeline:8751bd4
DOCKER_BUILDKIT=1 docker manifest create quay.io/netobserv/flowlogs-pipeline:8751bd4  --amend quay.io/netobserv/flowlogs-pipeline:8751bd4-amd64;
quay.io/netobserv/flowlogs-pipeline:8751bd4-amd64 is a manifest list

[openshift-ci]

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[openshift-ci]

@jotak: 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/integration-tests	b8e9874	link	true	/test integration-tests

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