"The resource you requested was not found." error when applying to an Octopus instance using a virtualdir.

[Justin-Walsh]

Describe the bug
When using a virtualdir (https://domain/directory) for your Octopus Deploy instance, Terraform will throw a "The resource you requested was not found. []" error when attempting an apply. It looks like because the links contain the virtualdir, we're double-appending it (http://localhost/virtual/virtual/api....), resulting in a 404.

Steps to reproduce

1. Add a Octopus binding for the following URLs: http://localhost, http://localhost/virtual.
2. Configure a sample tf file (see below) using the virtualdir URL in the Provider address directive.
3. Attempt to apply.
4. 💥

Expected behavior
Apply will respect the VirtualDir and apply as expected.

Logs and other supporting information
Apply log:

Failed with exit code: 1
Error: Octopus API error: The resource you requested was not found. []
with octopusdeploy_deployment_process.database,
on template.tf line 15, in resource "octopusdeploy_deployment_process" "database":
15: resource "octopusdeploy_deployment_process" "database" {

Octopus Server logged HTTP Requests:

2024-08-09 11:28:18.3446  11128    140  INFO  "HTTP" "GET" to "localhost""/api/Spaces-1/projects/Projects-1782" "completed" with 200 in 00:00:00.0092378 (9ms) by "x"
2024-08-09 11:28:18.3446  11128    140  INFO  "HTTP" "GET" to "localhost""/api/Spaces-1/deploymentprocesses/deploymentprocess-Projects-1782" "completed" with 200 in 00:00:00.0085337 (8ms) by "x"
2024-08-09 11:28:18.3446  11128    140  INFO  "HTTP" "PUT" to "localhost""/virtual/api/Spaces-1/projects/Projects-1782/deploymentprocesses" "completed" with 404 in 00:00:00.0044581 (4ms) by "x"

Note that the PUT includes the virtualdir, which would typically be stripped in the logs. You can see this in the preceding GET.

Environment and versions:

• Octopus Server Version: 2023.3.13181
• Terraform Version: 1.9.4
• Octopus Terraform Provider Version: 0.22.1 and 0.30.0-beta1

Additional context

terraform {
  required_providers {
      octopusdeploy = {
          source = "OctopusDeployLabs/octopusdeploy"
      }
  }
}

provider "octopusdeploy" {
address       = "http://localhost/virtual"
api_key       = "API-xxx"
space_id      = "Spaces-1"
}

resource "octopusdeploy_deployment_process" "database" {
  project_id = "Projects-1"
  space_id   = "Spaces-1"

  step {
    condition = "Success"

    name                = "Hello world (using PowerShell)"
    package_requirement = "LetOctopusDecide"
    start_trigger       = "StartAfterPrevious"

    run_script_action {
      can_be_used_for_project_versioning = false
      condition                          = "Success"
      is_disabled                        = false
      is_required                        = true
      name                               = "Hello world (using PowerShell)"
      script_body                        = <<-EOT
          Write-Host 'Hello world, using PowerShell 1'
          #TODO: Experiment with steps of your own :)
          Write-Host '[Learn more about the types of steps available in Octopus](https://g.octopushq.com/OnboardingAddStepsLearnMore)'
        EOT
      run_on_server                      = true
    }
  }

  step {
    condition           = "Success"
    name                = "Hello world (using Bash)"
    package_requirement = "LetOctopusDecide"
    start_trigger       = "StartWithPrevious"

    run_script_action {
      can_be_used_for_project_versioning = false
      condition                          = "Success"
      is_disabled                        = false
      is_required                        = true
      name                               = "Hello world (using Bash)"
      script_body                        = <<-EOT
          echo 'Hello world, using Bash 2'
          #TODO: Experiment with steps of your own :)
          echo '[Learn more about the types of steps available in Octopus](https://g.octopushq.com/OnboardingAddStepsLearnMore)'
        EOT
      run_on_server                      = true
    }
  }
}