* add optional resource limits to Machinaris Chart on `test` track

* removed question mark

* regex validation of values

* Memory validation comes straight from `k3s-io/k3s` in `vendor/k8s.io/apimachinery/pkg/api/resource/quantity.go`
* CPU validation is home-grown and allows both the fractional representation as well as the "millicore" representation, but because the minimum precision is `1m`, fractions and millicores cannot be used together ([read more](https://kubernetes.io/docs/concepts/configuration/manage-resources-containers/#meaning-of-cpu))
  * any string containing a period MUST NOT end with an `m` as this must be a fractional representation
  * otherwise any string containing only digits MAY end with an `m` (to represent a number of millicores) or not (to represent one or more entire cores)