[Enhancement][helm-chart] Add values.schema.json to helm chart

[bkomraz1]

Is your feature request related to a problem? Please describe.
There is no possibility to check validity of chart values especially for such complicated values as expiration

Describe the solution you'd like
Add values.schema.json: A JSON Schema for imposing a structure on the values.yaml file

Describe alternatives you've considered
No

Additional context
https://austindewey.com/2020/06/13/helm-tricks-input-validation-with-values-schema-json/

@Amitk3293