helm template --output-dir multiple runs will produce incorrect manifests

[sstarcher]

Running helm template csi-secrets-store secrets-store-csi-driver/secrets-store-csi-driver --output-dir blah

Will produce correct manifests, but if you run it a second time any files that contain helm hooks will get appended to and will have duplicate contents. I would expect the files to be identical if you ran the command multiple times.

These will be the files that keep getting appended

        modified:   blah/secrets-store-csi-driver/templates/crds-upgrade-hook.yaml
        modified:   blah/secrets-store-csi-driver/templates/keep-crds-upgrade-hook.yaml

Output of helm version:

3.14.1

Output of kubectl version:

1.29.2

Cloud Provider/Platform (AKS, GKE, Minikube etc.):

N/A