Allow querying for driver features from templates

[afbjorklund]

Description

Currently we have templates that are reading deprecated limayaml:

templates/docker-rootful.yaml:  {{- if .Instance.Config.VMOpts.VZ.Rosetta.Enabled}}
templates/docker.yaml:  {{- if .Instance.Config.VMOpts.VZ.Rosetta.Enabled}}

They need some new way to query this, when it is a driver feature.

That is: the VZ.Rosetta.Enabled struct is "unknown" to the lima core

[norio-nomura]

Making .Instance.Config.VMOpts as an abstract map (#3993) should behave similarly to how Param works.

[norio-nomura]

Making .Instance.Config.VMOpts as an abstract map (#3993) should behave similarly to how Param works.

Sorry, it changes the type from bool to string. But it seems like an acceptable change for me. 🤔
{{- if eq .Instance.Config.VMOpts.VZ.Rosetta.Enabled "true"}}

[norio-nomura]

Sorry, it changes the type from bool to string.

It seems to work as bool: https://go.dev/play/p/Upkmsf_nhw-

[norio-nomura]

It also works with undefined field: https://go.dev/play/p/VjiS7obW643

[afbjorklund]

Thanks for trying to test with config, but it does not work due to case sensitivity.
When we don't have a Go struct, the keys are mapped to the default yaml names...

• Convert limatype.VMOpts to an abstract map #3899

Go struct: .Instance.Config.VMOpts.VZ.Rosetta.Enabled
From yaml: .Instance.Config.VMOpts.vz.rosetta.enabled

vmType: "vz"
vmOpts:
  vz:
    rosetta:
      enabled: true
      binfmt: false

Another "problem" is the order in output, it is alphabetical.