Change envVars from array to a map

[olenotron]

As a user of Helmet, I want to modify specific sections of envVars. However, it's not possible. This is because envVars is an array. Consequently, changing a single key is impossible since Helm overrides the entire set of variables. This PR fixes the open issue https://github.com/companyinfo/helm-charts/issues/19.

The solution involves changing the data type from an array to a map, like this:

# Current
envVars:
  - name: FOO
    value: "bar"
  - name: BOB
    value: "alice"

# New
envVars:
  FOO: "bar"
  BOB: "alive"

[zevisert]

Will valuesFrom still work with this format?

[p-afraz]

Will valuesFrom still work with this format?

@zevisert nice catch! this is a fix we can implement to support both cases:

envVars:
  FOO: "bar"
  BOB: 
    valueFrom:
      configMapKeyRef:
        name: "foo"
        key: "bar"

What do you think?

[zevisert]

@p-afraz Yeah, that format seems logical. Looking into the changes here now, the new helmet.dictToArray helper needs to be updated to support that.