[metricbeat/perfmon] Error reported when no error is present

[leehinman]

• Duplicates [Metricbeat] windows.perfmon - No error, but error.message added to event #38401

PR #35896 introduced a bug in metricbeat perfmon module.

At

beats/metricbeat/module/windows/perfmon/data.go

Line 72 in 0361e30

Error: fmt.Errorf("failed on query=%v: %w", counterPath, val.Err.Error),

The previous use of errors.Wrap, would have kept this as a nil error if val.Err.Error was nil, the current code makes a non nil Error.

This leads to things like the following in events:

"error.message": [
      "failed on query=\\\\SERVER01\\Processor(5)\\% DPC Time: %!w(<nil>)"
    ],

[elasticmachine]

Pinging @elastic/elastic-agent-data-plane (Team:Elastic-Agent-Data-Plane)