Add logql filter to match stages and drop capability

[cyriltovena]

This adds filter expressions to the match stage such as :

• {job="mysql"} |= "error"
• {name="kafka"} |~ "tsdb-ops.*io:2003"
• {instance=~"kafka-[23]",name="kafka"} != kafka.server:type=ReplicaManager

but also introduces a new property action that when set to drop will drop all matching entries.

Fixes #1092 and #553

[pracucci]

FWIW, look all good to me 👍

[owen-d]

Not incredibly familiar with this, but it looks good.