Add new Resource Monitoring metrics

[evgenyfedorov2]

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

1. https://github.com/dotnet/extensions/pull/5290
2. https://github.com/dotnet/extensions/pull/5341
3. https://github.com/dotnet/extensions/pull/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