Describe the bug

Currently, the /otlp/v1/logs endpoint returns HTTP 204, not HTTP 200 on success.

To Reproduce

https://github.com/grafana/loki/blob/main/pkg/distributor/http.go#L76C22-L76C37

Expected behavior

The spec says to return 200, and folks have run into issues resulting in a change to opentelemetry-python. If this can switch back, then folks don't have to go around changing every language to prevent validation errors.