sources/kerberos: add kiprop to ignored system principals (cherry-pick #11852) #25450

Job	Run time
lint-golint	59s
test-unittest	2m 40s
ci-outpost-mark	1s
build-binary (proxy, linux, amd64)	1m 37s
build-binary (proxy, linux, arm64)	1m 44s
build-container (proxy)	4m 14s
build-binary (ldap, linux, amd64)	1m 40s
build-container (ldap)	2m 53s
build-binary (ldap, linux, arm64)	1m 48s
build-container (radius)	2m 26s
build-binary (radius, linux, amd64)	1m 40s
build-container (rac)	2m 30s
build-binary (radius, linux, arm64)	1m 44s
build-binary (rac, linux, amd64)	1m 32s
build-binary (rac, linux, arm64)	1m 44s
	29m 12s

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