New version changes:
* different alerts format
* rewritten storage (some config flags removed)
Closes-Bug: PROD-16609
Change-Id: I805fa322e4744e98177d6c3e29589ebc6fb917a2
Otherwise the alert fires as soon as Prometheus can't scrape a target.
It is too aggressive in case of transient connectivity issues or
endpoint restart.
Change-Id: Ib3de5b141db7a7f2397bf332844a9c44d38f2d3c