Provide case insensitivity (or validation)

[maracle6]

Is your feature request related to a problem? Please describe. Currently the provider name in helm charts is case sensitive, but not validated. This means if I enter EKS instead of eks helm will deploy with no complaints, but the appropriate annotations and other settings are not set. In most cases the charts will deploy as if “k8s” was entered if an invalid provider is supplied.

Describe the solution you'd like Either the provider names could be case insensitive, or perhaps it would be better to do a validation check to ensure a supported string was entered for this property. This way incorrect case would error out, as would typos or any unsupported platforms users attempt to enter.