chore(tracing): track spans_dropped telemetry for the trace writer pipeline#18967

mabdinur wants to merge 5 commits into

mainDataDog/dd-trace-py:mainfrom

munir/add-telemetry-to-AgentlessExportDataDog/dd-trace-py:munir/add-telemetry-to-AgentlessExportCopy head branch name to clipboard