Do not handle empty partial OTLP successes #3438
Merged
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Fix #3432.
The OTLP server will respond with empty partial success responses (i.e. empty messages and 0 count). Treat these as equivalent to it not being set/present like the documentation specifies in the proto: https://github.com/open-telemetry/opentelemetry-proto/blob/724e427879e3d2bae2edc0218fff06e37b9eb46e/opentelemetry/proto/collector/trace/v1/trace_service.proto#L58