This commit adds script changes to automatically allow packages to split
the CRD components located in a crd/ directory into a separate package.
It also automatically adds in a validation yaml helper to the main package
to prevent a user from installing the base package without installing the crd
install package first.
Any package can enable the creation of a separate crd package by just adding
`splitCRDsIntoSeparatePackage: true` into the package.yaml, as shown in the
rancher-monitoring chart.