semconv update process did not catch the removal of a METRIC_ export

[trentm]

Semconv v1.37.0 removed system.network.dropped and system.network.packets while renaming them. (IIUC they should have been deprecated, instead. I'll follow-up on the semantic-conventions repo separately: open-telemetry/semantic-conventions#2828) The issue here is that I would have hoped that the semconv update process here -- perhaps a lint guard, or the scripts/semconv/changelog-gen.js script -- would have caught this.

This shows that the commit for the v1.37.0 semconv update removed the METRIC_SYSTEM_NETWORK_DROPPED export with no mention in the changelog.

% git show 747da911759caa1f9c434eaf0a4a024fa2bbcea6 | rg DROPPED
+METRIC_SYSTEM_NETWORK_PACKET_DROPPED                                              // system.network.packet.dropped
-export const METRIC_SYSTEM_NETWORK_DROPPED = 'system.network.dropped' as const;
+export const METRIC_SYSTEM_NETWORK_PACKET_DROPPED = 'system.network.packet.dropped' as const;