replace the existing OpenCensus with OpenTelemetry

[debuggedme]

Is your feature request related to a problem? Please describe.

Any future tracing support will need to implement the OpenTelemetry standard (not included in this release).

I see there is a change in the tag/v1.8.0.

Are there any plans to replace the existing OpenCensus with OpenTelemetry now?

Describe the solution you'd like

For example, for gRPC, you only need to replace "go.opencensus.io/plugin/ocgrpc" with "go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc" and change some references. The process is similar for HTTP.

Describe alternatives you've considered

Additional context