Add new Resource Monitoring metrics

[evgenyfedorov2]

Following PRs related to metrics were recently merged in the dotnet/extensions repo:

1. Support metrics in ResourceMonitoring for Windows extensions#5290
2. Add metrics with correct names for Resource Monitoring extensions#5341
3. Add network metrics to Resource Monitoring for Linux extensions#5367

which, shortly, include these changes:

• Completely new container.* metrics were added.
• Already existing metrics became available on both Linux and Windows.

So, in this PR, I make respective changes in the docs.

---

Internal previews

📄 File	🔗 Preview link
docs/core/diagnostics/built-in-metrics-diagnostics.md	docs/core/diagnostics/built-in-metrics-diagnostics

[evgenyfedorov2]

Also relates to dotnet/extensions#5360

[gewarren]

Thanks @evgenyfedorov2