Clean up comments and variable names #7278

Job	Run time
gomod	54s
docs	29s
image_tags	1s
lint	3m 47s
build (controller)	2m 35s
test (test)	11m 2s
build (kanctl)	2m 24s
reno_lint	37s
test (integration-test)	7m 47s
build (kando)	2m 21s
test (helm-test)	3m 9s
release	0s
release_example_docker_images	0s
	35m 6s

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