Werk #14775: Add overflow counters to status table

Component	Livestatus
Title	Add overflow counters to status table
Date	Nov 8, 2022
Level	Trivial Change
Class	New Feature
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.2.0b1 Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.1.0p17 Checkmk Enterprise (CEE), Checkmk MSP (CME)

This adds 6 columns to the status table in livestatus: carbon_overflows, carbon_overflows_rate, influxdb_overflows, influxdb_overflows_rate, rrdcached_overflows, and rrdcached_overflows_rate. These columns display count of rate of data that could not be sent to their respective connections.

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