Remove bound metric instruments from the API (new champion) #2399
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@jmacd has become overloaded and asked me to take over #2352 . Because it needs a rebase and a few additions it's easier to start a new PR.
From the original PR:
This demonstrates how much code we can remove by eliminating bound instruments. I believe this is worthwhile and I would rather focus on optimizing the code path for extracting baggage and the performance of RecordBatch(), not individual bound instrument APIs.
Fixes #2351
Changes from #2353: