feat(operator): Add LabelExt trait #4571

Job	Run time
Run RustDoc	1m 46s
Run Cargo Udeps	2m 7s
Run Cargo Deny (advisories)	55s
Run Cargo Deny (bans licenses sources)	55s
Run Cargo Tests	2m 10s
All tests passed	3s
	7m 56s

Provide feedback