[2.4.0] Checkmk Werk 17275 created: Introduce cmk/customer host label

[//]: # (werk v2) # Introduce cmk/customer host label key | value ---------- | --- date | 2024-09-05T13:06:17+00:00 version | 2.4.0b1 class | feature edition | cme component | multisite level | 1 compatible | yes The MSP edition will now create a `cmk/customer` label for each host. This label can be used to configure filters based on customers.