Werk #17421: LDAP: Catch incorrectly configured roles group dn in the schema

Component	REST API
Title	LDAP: Catch incorrectly configured roles group dn in the schema
Date	Jan 14, 2025
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.5.0b1 Not yet released Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.4.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

This change fixes two issues.

1. The group_dn within sync_plugins -> groups_to_roles should endwith the configured group_dn, not be equal to it.
2. We now catch this config error in the request schema instead of raising a ValueError and generating a crash report.

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