CI: Allow to run tear down job even on failed pipeline

[dkijania]

We encounter a situation in PR: #16370 , where there was no possibility to test teard down stage due to merges conflict. As a lesson learn we propose to implement 3 improvements to CI:

• Introduce publish jobs only pipeline which will take ENV_VAR with BUILDKITE_JOB_ID whose artifacts should be published
• Introduce tear job only pipeline which will take ENV_VAR with BUILDKITE_JOB_ID and run tear down
• reorganize merges checks not to block tear down stage