CI Stability: DotNetPerfMetricsTestsGCSamplerV2Core.ExpectedMetrics_GarbageCollection

[chynesNR]

DotNetPerfMetricsTestsGCSamplerV2Core.ExpectedMetrics_GarbageCollection is an integration test that fails regularly. Can we make it more reliable?

e.g. https://github.com/newrelic/newrelic-dotnet-agent/actions/runs/22480313484/job/65118507687

[Newrelic-Boomi]

https://new-relic.atlassian.net/browse/NR-533801