[feature request] Support RPC Server Metrics for ASP.NET Core gRPC #4369

Component

OpenTelemetry.Instrumentation.AspNetCore

Is your feature request related to a problem?

We implement traces for gRPC/RPC, but not RPC Server Metrics for ASP.NET Core.

What is the expected behavior?

Implement the Semantic Conventions for RPC server metrics when using gRPC with ASP.NET Core.

Which alternative solutions or features have you considered?

None.

Additional context

The RPC Semantic Conventions have reached the RC stage.

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