Werk #14663: Add two new etherbox checks

Component	Checks & agents
Title	Add two new etherbox checks
Date	Aug 4, 2022
Level	Trivial Change
Class	New Feature
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.2.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

Checks for a voltage sensor and information if no sensor is detected on a port have been added.

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