chore: Errkit migration 6 (pkg/secrets) #7069

Job	Run time
gomod	53s
docs	30s
image_tags	1s
lint	3m 36s
reno_lint	40s
build (controller)	2m 28s
test (test)	10m 57s
build (kanctl)	2m 19s
test (integration-test)	8m 5s
build (kando)	2m 15s
test (helm-test)	3m 8s
release	0s
release_example_docker_images	0s
	34m 52s

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