Remove max_heartbeat_period from configuration

Remove max_heartbeat_period from alter system

added domain/config label

mentioned in merge request !1520 (merged)

added triaged label

changed milestone to %25.1 - Datamart

added p/high label

removed p/high label

In fact this is a breaking change, but at this point it wont break existing installations unless this parameter is used which is to our knowledge is not the case

Сейчас дефолт 5 секунд. Так и оставить? @d.rodionov @e-ivkov @kostja

assigned to @kusancho

mentioned in merge request !1570 (merged)

closed with merge request !1570 (merged)