chore: Errkit migration 6 (pkg/secrets) (#3173) #7070

Job	Run time
docs	30s
gomod	51s
image_tags	1s
build (controller)	2m 25s
build (kanctl)	2m 29s
lint	3m 27s
build (kando)	2m 10s
test (test)	11m 1s
reno_lint	38s
test (integration-test)	8m 4s
test (helm-test)	3m 2s
release	11m 1s
release_example_docker_images / build_cassandra / build_image	41s
release_example_docker_images / build_mysql_sidecar / build_image	2m 16s
release_example_docker_images / build_es-sidecar / build_image	7m 27s
release_example_docker_images / build_kafka-adobe-s3-sink-connector / build_image	7m 27s
release_example_docker_images / build_kafka-adobe-s3-source-connector / build_image	7m 28s
release_example_docker_images / build_postgres-kanister-tools / build_image	7m 20s
release_example_docker_images / build_postgresql / build_image	5m 24s
release_example_docker_images / build_mongodb / build_image	43s
release_example_docker_images / build_mssql-tools / build_image	41s
	1h 25m 6s

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