[OTLP] Cache resource bytes for protobuf serializer#7303

martincostello merged 10 commits into

open-telemetry:mainopen-telemetry/opentelemetry-dotnet:mainfrom

unsafePtr:perf/pre-serialize-otlp-resourceunsafePtr/opentelemetry-dotnet:perf/pre-serialize-otlp-resourceCopy head branch name to clipboard