In Slack notifications like https://redhat-internal.slack.com/archives/C07FV7DUX0E/p1748939764725059, we get incorrect "event_type" (push or pull_request) for retested pipeline runs, because we use event_type. 

Context: https://github.com/stackrox/konflux-tasks/pull/60#discussion_r2122978689 

The Slack task does not render environment variables in the message, so we need to have the event type from another finally task result.