Insert Values into Secret Store

[danpetitt]

Is your feature request related to a problem? Please describe

Its very frustrating having to manage secret store values outside of terraform, it makes a release more complex with timing when you have to manage the values separately.

Describe the solution you'd like

A new resource to add a value into a secret store:

resource "fastly_secretstore" "example" {
  name = "my_secret_store"
}

resource "aws_iam_user" "example" {
  name = "fastly_access"
}

resource "aws_iam_access_key" "example" {
  user = aws_iam_user.example.name
}

resource "fastly_secretstore_value" "example" {
  store_id = fastly_secretstore.example.id
  content  = aws_iam_access_key.example.secret
}

Describe alternatives you've considered

Only option is to deploy terraform and then edit fastly values manually via the web site or CLI.

Additional context

None