Werk #14162: Removed broken folders_by_id cache

Component	Setup
Title	Removed broken folders_by_id cache
Date	Jul 4, 2022
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.2.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT 2.1.0p6 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

A lookup cache for searching for folders via their internal hexid was removed because it was broken. The feature itself is still working, though a little bit slower. This mostly affected the REST API.

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