feat: add grpcutil.IsErrorCode

[jhalterman]

What this PR does:

Adds a grpcutil function, IsErrorCode, for checking if an error is a grpc status error with any of the matching codes.

Checklist

• Tests updated

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Note

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[pracucci]

Hi! 👋 We recently merged #947 which changed the CI configuration for unit tests. To get CI passing on this PR, please rebase on the latest main branch:

git fetch origin main
git rebase origin/main
git push --force-with-lease

Thanks!