Bump go version and remove no useful tracing code

[Aisuko]

Description

This PR fixes #125

Notes for Reviewers

• Bump version of Go to v1.21
• Bump version of meshkit to v0.6.77
• Bump go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc to v0.45.0
• Bump the version of github.com/grpc-ecosystem/go-grpc-middleware/v2 to the stable version v2.0.1

And remove the no useful tracing features. It imported go.opentelemetry.io different version with go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc. And the one of the reasons here is that go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc didn't update the go.opentelemetry.io version yet. And there is no any other adapters are using tracing feature. So, removing it.

Removing tracing feature can also cause breaking change of grpc Start function.

Signed commits

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