HTTP support OLTP receivers support

[pollosp]

Is your feature request related to a problem? Please describe

Looks like currently the module only support sending OTEL data via GRPC OLTP receivers , would be nice to support HTTP as there are many OTEL users which relay in HTTP instead of GRPC due some load balancers.

Describe the solution you'd like

Into the otel_exporter configuration you can set protocol explicitly working with GRPC as default

 otel_exporter {
        endpoint localhost:4317;
        protocol http
    }