Add an otelcol.receiver.datadog

[ptodev]

Request

Various folks have requested that we add the datadog receiver from OTel contrib to Alloy.

Use case

It's useful for folks to ingest traces in the Datadog APM format. I suppose there are still lots of applications which are Datadog-instrumented.

[kehindesalaam]

Hello @ptodev , I would like to pick this up, could you please assign it to me?

[ptodev]

Hi, @kehindesalaam, of course! Thank you!

[ptodev]

Hi @kehindesalaam - just to let you know, otelcol.exporter.logging is a simple OTel component which you could use as a example:
https://github.com/grafana/alloy/blob/main/internal/component/otelcol/exporter/logging/logging.go
https://github.com/grafana/alloy/blob/main/docs/sources/reference/components/otelcol.exporter.logging.md
https://grafana.com/docs/alloy/latest/reference/components/otelcol.exporter.logging/