open-telemetry/transport-grpc throws exception if no "path" is set

[Danielss89]

Using open-telemetry/transport-grpc (1.1.0) i've set my config to: OTEL_EXPORTER_OTLP_ENDPOINT: http://otel-collector:4317
(I also tried with trailing /)
as i have the otel-collector running in another container. The otel-collector grpc receiver doesn't have a path and as such, i can't configure one.

The transport is hardcoded to throw an exception if no path is set:
https://github.com/opentelemetry-php/transport-grpc/blob/main/GrpcTransportFactory.php#L47