Add includeCRDs Field to HelmChart

This commit adds functionality for a user to specify that `helm` should
include CRDs when inflating a Helm Chart.

As of Helm v3, the `install-crd` hook is no more, with
`CustomResourceDefinitions` existing in the root of the chart, under the
`crds` directory.

When calling `helm template`, `helm` does not output these CRDs unless
the user passes the `--include-crds` flag to the command.

With this commit, users can set `includeCRDs: true` as part of their helm
chart definition in `kustomize.yaml` to have these included as part of
the output.

Signed-off-by: Devon Mizelle <devon.mizelle@onepeloton.com>

api/types/helmchartargs.go

@@ -68,6 +68,10 @@ type HelmChart struct {
 	// Legal values: 'merge', 'override', 'replace'.
 	// Defaults to 'override'.
 	ValuesMerge string `json:"valuesMerge,omitempty" yaml:"valuesMerge,omitempty"`
+
+	// InstallCRDs specifies if Helm should also generate CustomResourceDefinitions.
+	// Defaults to 'false'.
+	IncludeCRDs bool `json:"includeCRDs,omitempty" yaml:"includeCRDs,omitempty"`
 }
 
 // HelmChartArgs contains arguments to helm.