Werk #15149: agent_azure: Fix crash if the metric isn't found

Component	Agent bakery
Title	agent_azure: Fix crash if the metric isn't found
Date	Feb 27, 2023
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.3.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.2.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.1.0p23 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

The Azure agent would crash if the metric wasn't available for a resource. Now, the agent doesn't crash and retries to fetch available metrics.

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