Map faas.* attributes to generic_task in resource mapping

[dashpole]

Implement GoogleCloudPlatform/opentelemetry-operations-python#273 in the resource mapping in this repository.

[dgnemo]

idk if this issue refers to the same problem I am describing below, but I am going to report it anyway :)

As I was reading the code to understand why cloud_run metrics are logged as generic_node instead of generic_task
I came to believe that every instance of semconv.FaaSIDKey in
https://github.com/GoogleCloudPlatform/opentelemetry-operations-go/blob/main/internal/resourcemapping/resourcemapping.go
should actually be changed to semconv.FaaSInstanceKey

Any thoughts on this?

[dashpole]

You are correct. That was definitely an oversight during #679. I'll make sure that is fixed as well. Thanks for pointing it out.