[WIP]

[Lincoln-developer]

Description

Enable users of the grpc plugin to register hooks on grpc request and response (server and client, unary and stream). The hooks are called before the stream begins to handle data, allowing the plugin user to register to events

Fixes # (issue) Adding request/response hooks to grpc-instrumentation

Type of change

• [ ] New feature (non-breaking change which adds functionality)

How Has This Been Tested?

• [ ] Test A

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• [ ] Test A

Does This PR Require a Core Repo Change?

• [ ] Yes. - Link to PR:
• [ ] No.

Checklist:

See contributing.md for styleguide, changelog guidelines, and more.

• [ ] Followed the style guidelines of this project
• [ ] Changelogs have been updated
• [ ] Unit tests have been added
• [ ] Documentation has been updated