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Werk #18597: Fix various certificate verification errors for special agents

Component Checks & agents
Title Fix various certificate verification errors for special agents
Date Dec 9, 2025
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed
Checkmk versions & editions
2.5.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT
2.4.0p18 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT

This fixes certificate verification errors various special agents (in particular but not exclusively special_prism and special_vsphere). An incomplete environment used by the automation helpers caused some certificate validations to fail during manual discovery (but not during actual checking).

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