feature: opentelemetry for the gRPC plugin

[cv65kr]

Reason for This PR

roadrunner-server/roadrunner#1313

Description of Changes

Possibility to use telemetry for gRPC

Doc: roadrunner-server/roadrunner-docs#127

License Acceptance

By submitting this pull request, I confirm that my contribution is made under
the terms of the MIT license.

PR Checklist

[Author TODO: Meet these criteria.]
[Reviewer TODO: Verify that these criteria are met. Request changes if not]

• All commits in this PR are signed (git commit -s).
• The reason for this PR is clearly provided (issue no. or explanation).
• The description of changes is clear and encompassing.
• Any required documentation changes (code and docs) are included in this PR.
• Any user-facing changes are mentioned in CHANGELOG.md.
• All added/changed functionality is tested.

[rustatian]

Hey @cv65kr 👋🏻
Nice 👍🏻

One note, in the v2023 we're going to move the otel configuration out of the http. It should be available like a plugin's configs as a top yaml key.

[cv65kr]

@rustatian I pushed one small change for propagators, now should looks like final PR

[rustatian]

lgtm 👍🏻