[FIX #337] support terraform plan -refresh=false

[rjinski]

#337

Add the ability to support the refresh-false terraform plan argument.

-refresh=false      Skip checking for external changes to remote objects
                      while creating the plan. This can potentially make
                      planning faster, but at the expense of possibly planning
                      against a stale record of the remote system state.

https://developer.hashicorp.com/terraform/cli/commands/plan#planning-options
https://opentofu.org/docs/cli/commands/plan/#planning-options

[github-actions]

Terraform plan for pull_request_target

Plan: 1 to add, 0 to change, 0 to destroy. Changes to Outputs.

Terraform used the selected providers to generate the following execution
plan. Resource actions are indicated with the following symbols:
+   create

Terraform will perform the following actions:

  # random_string.my_string will be created
+   resource "random_string" "my_string" {
+       id          = (known after apply)
+       length      = 11
+       lower       = true
+       min_lower   = 0
+       min_numeric = 0
+       min_special = 0
+       min_upper   = 0
+       number      = true
+       numeric     = true
+       result      = (known after apply)
+       special     = true
+       upper       = true
    }

Plan: 1 to add, 0 to change, 0 to destroy.

Changes to Outputs:
+   output_string = "the_string"

✅ Plan applied in pull_request_target test #614

Outputs

output_string = "the_string"

[rjinski]

@dflook any objections to these changes?