feat: support go-redis v9

[wzy9607]

go-redis has recently released v9 version, this pull request adds instrumentation support for it.

[cla-checker-service]

💚 CLA has been signed

[dmathieu]

Note: the next release of the agent will include an apmotel package (and traces coming soon).

This means any OpenTelemetry instrumentation package will be supported as well. So the package provided by go-redis themselves would be a good replacement for the instrumentation in here.
https://github.com/redis/go-redis/tree/master/extra/redisotel

[dmathieu]

As goredis doesn't support older versions of Go, you should add a build tag to prevent building with those non-supported versions.

//go:build go1.18

In every file, except in doc.go, so there's at least one built file in the package.

[wzy9607]

Note: the next release of the agent will include an apmotel package (and traces coming soon).

This means any OpenTelemetry instrumentation package will be supported as well. So the package provided by go-redis themselves would be a good replacement for the instrumentation in here. https://github.com/redis/go-redis/tree/master/extra/redisotel

Thanks.
I wasn't aware of goredis's otel support. After examing what redisotel provides, I think it's indeed a good replacement for this pull request. I will close this pr in favor of #1410 .