WIP: Migrate metrics to otel

[jjcollinge]

Signed-off-by: Joni Collinge jonathancollinge@live.com

Description

This is an early draft PR that I'll iterate on to see what migrating from opencensus to opentelemetry will look like for Dapr metrics.
This is very likely to be a breaking change (even with the OpenCensus bridge) and will require user notice and possibly opt-in configuration for 1.14.

OpenCensus is deprecated: https://opentelemetry.io/blog/2023/sunsetting-opencensus/

Issue reference

Please reference the issue this PR will close: #[issue number]

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• Code compiles correctly
• Created/updated tests
• Unit tests passing
• End-to-end tests passing
• Extended the documentation / Created issue in the https://github.com/dapr/docs/ repo: dapr/docs#[issue number]
• Specification has been updated / Created issue in the https://github.com/dapr/docs/ repo: dapr/docs#[issue number]
• Provided sample for the feature / Created issue in the https://github.com/dapr/docs/ repo: dapr/docs#[issue number]

[dapr-bot]

This pull request has been automatically marked as stale because it has not had activity in the last 60 days. It will be closed in 7 days if no further activity occurs. Please feel free to give a status update now, ping for review, or re-open when it's ready. Thank you for your contributions!

[dapr-bot]

This pull request has been automatically closed because it has not had activity in the last 67 days. Please feel free to give a status update now, ping for review, or re-open when it's ready. Thank you for your contributions!