Feature Request: Add YAML configfile support for configuring addons

[panyam]

In #20124, support was added for passing a config file to configure addons so that users would not have to manually enter values in a prompt. The config file contents were of JSON structure mapping to the following schema:

minikube/cmd/minikube/cmd/config/configure.go

Line 49 in 7b97f42

type addonConfig struct {

For ease of use it would be useful for users to be able to pass a YAML file (adhering to the same schema) instead.

[BeElectronicSakshi]

@medyagh , is it open to work?