Segfault in metrics_simple example on Windows

[dbarker]

The metrics_simple example application sometimes segfaults in Windows.

A reproduction was observed in ci testing #3449

• https://github.com/open-telemetry/opentelemetry-cpp/actions/runs/15358056328/job/43220935557?pr=3449#step:6:2576

[github-actions]

This issue was marked as stale due to lack of activity.