Merge async-changs

[owent]

Is your feature request related to a problem?
The first version of async APIs of traces and logs is finished.We can merge these changes now and continue to work on more async implements for OtlpGrpc*Exporter or thread pool for curl::HttpClient.

Describe the solution you'd like

git reset --hard main
git merge --squash async-changes
git commit -m "Merge all commits from `async-changes`"

And the create PR from this commit to main .

Describe alternatives you've considered

git reset --hard main
git merge async-changes

Additional context

With --squash, we will merge all commits in async-changes into one but keep the history of main clean.