Add Scheduling and WF Execution Latency metrics

[DeepanshuA]

In what area(s)?

/area runtime

Describe the feature

As a follow up of #7109, we would need to add following metrics as well to Workflow metrics:

• Workflow Execution Latency
• Scheduling Latency

More details can be found in this comment: #7109 (comment)

Release Note

RELEASE NOTE:

[dapr-bot]

This issue has been automatically marked as stale because it has not had activity in the last 60 days. It will be closed in the next 7 days unless it is tagged (pinned, good first issue, help wanted or triaged/resolved) or other activity occurs. Thank you for your contributions.

[dapr-bot]

This issue has been automatically closed because it has not had activity in the last 67 days. If this issue is still valid, please ping a maintainer and ask them to label it as pinned, good first issue, help wanted or triaged/resolved. Thank you for your contributions.