Support fmtverbs in resource names

[gdavison]

Adds support for format verbs in resource names. For example, in https://github.com/hashicorp/terraform-provider-aws/blob/38319aa13aea65d3e946450c1f881d8fef12e734/aws/resource_aws_quicksight_user_test.go#L195-L203

data "aws_caller_identity" "current" {}

resource "aws_quicksight_user" %[1]q {
  aws_account_id = data.aws_caller_identity.current.account_id
  user_name      = %[1]q
  email          = %[2]q
  identity_type  = "QUICKSIGHT"
  user_role      = "READER"
}

Closes #48

Also handles provider meta-argument.

[katbyte]

LGTM 🎩