Update and document gRPC instrumentation semantic conventions

[dyladan]

Similar to open-telemetry/opentelemetry-js-contrib#1778

Many OTel JS instrumentations export telemetry with out of date semantic conventions. Unfortunately, we have not clearly documented the version of semantic conventions implemented or which attributes are exported for instrumentations. For each package, we need to document the telemetry exported and if possible update it to the latest semantic conventions following the following template:

This package implements the grpc semantic convention version X.Y: <link to semantic convention>

Attributes collected:

| Attribute | Short Description | Notes |
| --------- | ----------------- | ----- |
|           |                   |       |

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