[Bug]: opentelemetry-otlp inconsistency between http and grpc export endpoint for traces

[bnjjj]

What happened?

When using the http and grpc exporter for traces you have to fill the endpoint value but when using the http one you have to specify the /v1/traces path and not with the grpc one. You can see in your examples here and here it's both different. But under the hood it's configuring the struct ExportConfig and in the documentation for endpoint it's explicit that it should be the base address. So I think there is a bug in the configuration here.

To keep backward compatibility maybe it could be interesting to directly check if the address already contains /v1/traces we don't modify the URL.

API Version

0.13.0

SDK Version

0.13.0

What Exporters are you seeing the problem on?

OTLP

Relevant log output

No response

[TommyCpp]

Seems like an issue that we didn't handle the endpoint provided in builder correclty. Will put a fix next week.

Just to double check: if there is no environment variable configuration but user provided a URL in builder, we should not modify the URL