chore: consolidate clusterpolicy validation code #3035

Job	Run time
code-scanning / Analyze Go code with CodeQL	4m 5s
golang-checks / go-build	1m 44s
golang-checks / unit tests	39s
variables / variables	7s
config-checks / validate-csv	41s
config-checks / validate-helm-values	34s
config-checks / helm-lint	9s
golang-checks / go-check	1m 4s
image-builds	0s
coverage	0s
e2e-tests	0s
release	0s
	9m 3s

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