chore: consolidate clusterpolicy validation code #3034

Job	Run time
code-scanning / Analyze Go code with CodeQL	4m 7s
config-checks / helm-lint	7s
variables / variables	8s
golang-checks / unit tests	38s
config-checks / validate-helm-values	34s
golang-checks / go-build	1m 42s
config-checks / validate-csv	48s
golang-checks / go-check	1m 5s
coverage	0s
image-builds	0s
e2e-tests	0s
release	0s
	9m 9s

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