Avoid generating manifests with empty envFrom fields

[mvgmb]

Closes #1629

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[k8s-ci-robot]

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[ConnorJC3]

/ok-to-test
/lgtm

[ConnorJC3]

Hi @mvgmb - this PR looks good as as (and we have enough reviewers), but we just merged in another PR that changes the helm chart that caused a merge conflict. Could you rebase your PR to fix the conflict, and then I can merge it in? Thanks!

[torredil]

Thanks @mvgmb /lgtm

[k8s-ci-robot]

@mvgmb: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-aws-ebs-csi-driver-test-e2e-external-eks-windows	3a67e4b	link	false	/test pull-aws-ebs-csi-driver-test-e2e-external-eks-windows

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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[ConnorJC3]

/retest
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ConnorJC3

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