Feature Request: Ability to configure HTTPS_PROXY/HTTP_PROXY for OCI images & Helm charts

I am getting this error caused by our corporate proxy:
`[1] KNV1068: failed to run kustomize build in /repo/source/d523134f8a76659526b7ab6b0ea3cc3908a00100/cert-manager, stdout: : Error: accumulating resources: accumulation err='accumulating resources from 'base': '/repo/source/d523134f8a76659526b7ab6b0ea3cc3908a00100/cert-manager/base' must resolve to a file': recursed accumulation of path '/repo/source/d523134f8a76659526b7ab6b0ea3cc3908a00100/cert-manager/base': Error: looks like "https://charts.jetstack.io" is not a valid chart repository or cannot be reached: Get "https://charts.jetstack.io/index.yaml": dial tcp 172.66.44.147:443: connect: connection timed out : unable to run: 'helm pull --untar --untardir /repo/source/d523134f8a76659526b7ab6b0ea3cc3908a00100/cert-manager/base/charts --repo https://charts.jetstack.io cert-manager --version v1.5.3' with env=[HELM_CONFIG_HOME=/tmp/kustomize-helm-924204340/helm HELM_CACHE_HOME=/tmp/kustomize-helm-924204340/helm/.cache HELM_DATA_HOME=/tmp/kustomize-helm-924204340/helm/.data] (is 'helm' installed?) For more information, see https://g.co/cloud/acm-errors#knv1068
`

How do you configure the corresponding namespace reconciler to use a proxy? Editing the ns-reconciler (or reconciler-manager) configmap to add an HTTPS_PROXY environment variable doesn't seem to be possible (automatically overridden).

Thanks.
Laurent Philippart