Enhancement: Bump kubectl 1.30 variants to 1.30.8 #527

Job	Run time
test-nogitdiff	15s
build-1-31-4	45s
build-1-26-15	42s
build-1-27-16	39s
build-1-28-15	1m 28s
build-1-29-11	42s
build-1-30-8	1m 45s
build-1-17-17	50s
build-1-18-20	43s
build-1-19-16	43s
build-1-20-15	1m 20s
build-1-21-14	44s
build-1-23-17	1m 29s
build-1-22-17	38s
build-1-24-17	38s
build-1-25-16	1m 36s
build-1-14-10	1m 27s
build-1-15-12	1m 35s
build-1-16-15	1m 35s
update-dockerhub-description	0s
update-draft-release	0s
publish-draft-release	0s
	19m 34s

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