sysutils/{beats,logstash}*,textproc/{elasticsearch,kibana}*: Ports unification before adding 9.4

PKGNAMESUFFIX, CONFLICTS, PORTSCOUT, COMMENT, LOGSTASH_JRUBY_VER,
PORTVERSION => DISTVERSION

PR: 293746
Approved by: girgen (elastic, maintainer)
Sponsored by: UNIS Labs