Reworks the prometheus metrics to adhere to best practices #5174

3 / 4 tasks completed

1 task still to be completed

Task	Status
I have verified that my change is according to the deprecations & breaking changes policy	Completed
Tests have been added	Incomplete
Changelog has been updated and is aligned with our changelog requirements	Completed
Commits are signed with Developer Certificate of Origin (DCO - learn more)	Completed
Add an entry in our changelog in alphabetical order and link related issue	Incomplete
Update the documentation, if needed	Incomplete
Add unit & e2e tests for your changes	Incomplete
GitHub checks are passing	Incomplete
Is the DCO check failing? Here is how you can fix DCO issues	Incomplete
Our contribution guide	Incomplete
metrics are covered by e2e tests, so you have to update this file adding the new metrics	Incomplete
you've already done all the things related with the deprecation policy (after adding the change to the description), next steps have to be done once this is merged (opening issues, discussion, etc)	Incomplete
reworded the `totals` to `count` as preferred by Otel, and deprecated the old ones.	Incomplete
added the "s" unit to the latency metrics	Incomplete
added a test for the unit being recorded, and 500 milliseconds should show as 0.5	Incomplete