Disable strict mode for helm lint

[goruha]

What

• Disable strict mode for helm lint

Why

• It pay attention to non existed values in values.yaml like fullnameOverride
  But fullnameOverride is a pattern for chart naming and should not be defined in values.yaml
  The same case with global values

✅   (assume-role staging:39m) portal ➤  helm lint --strict
==> Linting .
[INFO] Chart.yaml: icon is recommended
[ERROR] templates/: render error in "portal/templates/proxy.service.yaml": template: portal/templates/proxy.service.yaml:5:11: executing "portal/templates/proxy.service.yaml" at <include "portal.prox...>: error calling include: template: portal/charts/common/templates/_fullname.tpl:21:39: executing "common.fullname" at <.Values.global>: map has no entry for key "global"