fix(drift): kube context, kubeconfig and auth

[maxime1907]

Fixes these issues:

• Auth issues when connecting with specific provider (gcp, oidc..) through the use of kube context, kubeconfig and namespace

  $ HELM_KUBECONTEXT="kind-kind" HELM_NAMESPACE="default" ./helm-drift_v0.1.0 run my-release --from-release
  {"level":"error","msg":"fetching helm release 'my-release' errored with 'Kubernetes cluster unreachable: no Auth Provider found for name \"oidc\"'","time":"2023-09-26T16:08:14+02:00"}
  {"level":"fatal","msg":"Kubernetes cluster unreachable: no Auth Provider found for name \"oidc\"","time":"2023-09-26T16:08:14+02:00"}

• Release namespace:

  $ ./helm-drift_v0.1.0 run my-release --from-release
  {"level":"fatal","msg":"calculating diff errored with: running kubectl diff errored with exit code: exit status 2 ,with message: Error from server (NotFound): namespaces \"=\" not found\n\nrunning kubectl diff errored with exit code: exit status 2 ,with message: Error from server (NotFound): namespaces \"=\" not found\n\nrunning kubectl diff errored with exit code: exit status 2 ,with message: Error from server (NotFound): namespaces \"=\" not found\n","time":"2023-09-26T12:53:17+02:00"}

[maxime1907]

cc @nikhilsbhat

[nikhilsbhat]

@maxime1907, Thanks for your contributions. I will review this and merge it this week.