Manually removed firewall rules not detected by provider

[kbcz1989]

Describe the bug
When tf managed rule is manually removed from gui, provider detects no change, even though it receives the answer "500 no rule at position X"

To Reproduce
Steps to reproduce the behavior:

1. Create a resource proxmox_virtual_environment_firewall_rules
2. Manually remove one of more created rules from GUI
3. Run terraform plan again
4. It shows no changes

Please also provide a minimal Terraform configuration that reproduces the issue.

resource "proxmox_virtual_environment_firewall_rules" "inbound" {
  node_name = var.node_name
  vm_id     = var.vm_id

  rule {
    type    = "in"
    action  = "ACCEPT"
    comment = "Allow HTTP"
    dest    = "192.168.1.5"
    dport   = "80"
    proto   = "tcp"
    log     = "info"
  }

  rule {
    type    = "in"
    action  = "ACCEPT"
    comment = "Allow HTTPS"
    dest    = "192.168.1.5"
    dport   = "443"
    proto   = "tcp"
    log     = "info"
  }
}

Expected behavior
Manually removed rule should be created again.

• Single or clustered Proxmox: clustered
• Proxmox version: 8.2.4
• Provider version (ideally it should be the latest version): 0.62.0
• Terraform/OpenTofu version: terraform 1.8.3
• OS (where you run Terraform/OpenTofu from): Ubuntu 22.04
• Debug logs (TF_LOG=DEBUG terraform apply):
  https://gist.github.com/kbcz1989/fab8b054b3fc55c064532b3ae223526e