Werk #16373: metrics: allow dots in metric ids

Component	REST API
Title	metrics: allow dots in metric ids
Date	Feb 28, 2024
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.4.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT 2.3.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT 2.2.0p26 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT

Before this Werk, the REST API was not able to access metrics named after IP addresses. This Werk fixes that and allows user to access metrics containing dots on the id

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