Replace build-image-index-konflux, build-image-index-extra or similar tasks with apply-tags task.
This has to be done in all three repos, in each pipeline, in each of the release branches.

Per investigation in this thread https://redhat-internal.slack.com/archives/C04PZ7H0VA8/p1756907730686349, the fact that we build index image concurrently two times likely leads to problems with incorrect SBOMs being looked up by Conforma. That manifests as errors in the Conforma output.

So far, this appeared only in Conforma but it could be the case that we will discover issues later. Let's fix it before we release too many images like that.