[Tracing Redesign][1/N] Add interceptor interface and tracinginterceptor skeleton #2301
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This is part of the series PRs to re-design& re-implement the tracing instrumentation in Yarpc-go (TODO: create a Github issue with details). The whole picture of the desired changes can be checked in this demonstration PR: #2296.
All PRs will be implemented in a separate branch -
dev-tracing-fix
before being merged into maindev
branch.The PR is defining the transport interceptor interface and creating the basic tracing interceptor skeleton code to reduce the burden for collaboration and paralleled coding.