Add docs on how to set a list value using set or set_sensitive

[nitrocode]

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Describe the Bug

There are times that you may want to add a list of values using a set operation. For example, if the list of values were sensitive. You would want to use set_sensitive and generally keep sensitive values out of set and values. By keeping secrets out of those inputs, the user will be able to see the full list of values (minus secrets) in the terraform plan. If secrets remain in set or values, then the plan will be hidden from the user under (sensitive).

See references for how to do this.

locals {
  # simple list
  fruits = join(",", [
    "banana",
    "apple",
    "strawberry",
  ])
  # list where some items contain a comma and those commas need to be escaped via a double backslash
  fruits_commas = join(",", [
    "banana\\,pears\\,grapes:somevalue",
    "apple\\,strawberry:somevalue",
  ])
}

resource helm_release default {
  # ...

  set_sensitive {
    name  = "controller.service.loadBalancerSourceRanges"
    value = "{${local.fruits}"
  }

  set_sensitive {
    name  = "controller.service.loadBalancerSourceRanges"
    value = "{${local.fruits_commas}"
  }
}

References

• Add functionality to set a list hashicorp/terraform-provider-helm#92