Add some runtime metrics of go and nodejs application.

[liyanwei93]

Changes

Add some runtime metrics of go and nodejs application. At the same time, we will gradually contribute these additional metrics to the community.

Merge Requirements

For new features contributions, please make sure you have completed the following
essential items:

• CHANGELOG.md updated to document new feature additions
• Appropriate documentation updates in the docs
• Appropriate Helm chart updates in the helm-charts

Maintainers will not merge until the above have been completed. If you're unsure
which docs need to be changed ping the
@open-telemetry/demo-approvers.