[monitor-opentelemetry] Live Metrics Filtering (for charts)

[harsimar]

Packages impacted by this PR

monitor-opentelemetry

Describe the problem that is addressed by this PR

This PR adds live metrics filtering, for the metrics charts.
The change to fix the document spam bug is also here, but I will also create a separate PR just for that.

There are a few things I didn't include in this PR that will be included separate future PRs:

• filtering for documents on right hand pane. Currently this change just emits all documents.
• changes to how CPU/Mem are to be collected for live metrics (per process counters).
• Retry/caching logic for requests made to QuickPulse. Currently this PR does not change this behavior, but for future parity with spec we should consider caching live metrics data points when post requests fail & reducing retries if there is a network error (considering ping/post happens every few seconds anyway).

Are there test cases added in this PR? (If not, why?)

Yes

Checklists

• Added impacted package name to the issue description
• Does this PR needs any fixes in the SDK Generator?** (If so, create an Issue in the Autorest/typescript repository and link it here)
• Added a changelog (if necessary)

[azure-sdk]

API change check

API changes are not detected in this pull request.

[hectorhdzg]

LGTM