kubelet-csr-approver not support offline installation

[JaneLiuL]

What would you like to be added

in our environment, not support to helm add outside helm repo. we can only bring this helm chart as vendor package in our folder, which not support helm upload vendor helm chart to our company.
is it possible to not use helm release , and install to link use command for "helm install kubelet-csr-approver xxx "

Why is this needed

production environment not support for download from helm repository.