feat: Allow specifying Helm values for operator installations #476

Job	Run time
General Pull Request Checks / Run Cargo Tests	4m 0s
General Pull Request Checks / Run Cargo Deny (advisories)	53s
General Pull Request Checks / Run Cargo Udeps	8m 55s
General Pull Request Checks / Run RustDoc	4m 53s
General Pull Request Checks / Run Cargo Deny (bans licenses sources)	51s
General Pull Request Checks / All tests passed	3s
Build stackablectl for x86_64-apple-darwin	5m 4s
Build stackablectl for aarch64-apple-darwin	4m 41s
Build stackablectl for aarch64-unknown-linux-gnu	2m 54s
Build stackablectl for x86_64-unknown-linux-gnu	3m 53s
	36m 7s

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