[chore][pkg/stanza] Cleanup copy operator files (#32061) #75433

Job	Run time
windows-unittest-matrix (receiver-0)	20m 14s
windows-unittest-matrix (receiver-1)	11m 22s
windows-unittest-matrix (processor)	25m 34s
windows-unittest-matrix (exporter)	20m 10s
windows-unittest-matrix (extension)	12m 12s
windows-unittest-matrix (internal)	8m 46s
windows-unittest-matrix (pkg)	15m 31s
windows-unittest-matrix (cmd)	15m 21s
windows-unittest-matrix (other)	11m 15s
windows-unittest	0s
	2h 20m 25s

Provide feedback