Expose volumes and volumeMounts in the add-on configuration

[lewayne-aws]

Is your feature request related to a problem? Please describe.
Currently, the helm chart supports adding volumes and volume mounts at deploy time

#1436: helm: Expose volumes and volumeMounts for the ebs-csi-controller deployment

This is not currently mirrored in the EKS addon configuration schema

Describe the solution you'd like in detail
Ideally, values supported by helm should be mirrored in the addon configuration

Describe alternatives you've considered
Currently, anyone needing to use these values would have to directly use the Helm chart, or patch resources after deployment via addons. Ideally, this should not be necessary

Additional context
There are similar requests for both amazon-vpc-cni-k8s and aws-efs-csi-driver with the same motivations.

[ElijahQuinones]

Hi @lewayne-aws

The team has met about this issue (among other values that are in the chart and not the add-on) and this is should actually make it into the 1.40 release. Will keep this issue open until then. Thank you !

[abroodav]

Hello team,
+1 on the request to mirror the helm chart parameters to the EKS add-on.

Another variance we found was with the optional parameter "storageclasses" which is not present in the EKS add-on.