Add GPU support: gpu_card / vgpu_profile data sources and GPU on service offerings

[poddm]

Summary

Adds GPU support to the provider, aligned with the GPU/vGPU APIs introduced in
recent CloudStack releases. This lets operators discover GPU cards and vGPU
profiles and attach GPUs to service offerings.

What's included

New data sources

• cloudstack_gpu_card — looks up a GPU card via the listGpuCards API.
  Exposes id, name, device_id, device_name, vendor_id, vendor_name.

• cloudstack_vgpu_profile — looks up a vGPU profile via the listVgpuProfiles
  API. Exposes id, name, description, device_id, device_name,
  gpu_card_id, gpu_card_name, max_heads, max_resolution_x,
  max_resolution_y, max_vgpu_per_physical_gpu, vendor_id, vendor_name,
  video_ram.

  Both data sources support the standard filter block (regex matching on
  returned fields).

Service offering GPU configuration

• Adds an optional gpu nested block to the service offering resources
  (constrained / fixed / unconstrained), with:
  • vgpu_profile_id (required) — vGPU profile to associate with the offering
  • count (optional) — number of GPUs assigned to the guest VM
  • display (optional) — whether the GPU is presented as a display device
  • All three force replacement when changed.

Docs

• Website documentation for gpu_card and vgpu_profile data sources.

Dependency

• Bumps github.com/apache/cloudstack-go/v2 from v2.18.1 to v2.19.1 for the
  GPU API bindings.

Example usage

data "cloudstack_gpu_card" "main" {
  filter {
    name  = "name"
    value = "Example Corp EX100GL \\[ExampleGPU 32GB\\]"
  }
}

data "cloudstack_vgpu_profile" "main" {
  filter {
    name  = "gpu_card_id"
    value = data.cloudstack_gpu_card.main.id
  }
  filter {
    name  = "name"
    value = "passthrough"
  }
}

resource "cloudstack_service_offering_constrained" "example" {
  name         = "example.gpu.offering"
  display_text = "Example GPU offering, vCPU 2-32, Memory 2G-128G"

  // compute
  cpu_speed      = 1024
  max_cpu_number = 32
  min_cpu_number = 2
  max_memory     = 131072
  min_memory     = 2048
  network_rate   = 10000

  // other
  disk_offering_id = var.disk_offering_id
  zone_ids         = var.zone_ids
  tags             = "EXAMPLE_STORAGE"
  host_tags        = "EXAMPLE_GPU"

  // Feature flags
  dynamic_scaling_enabled = true
  is_volatile             = false
  limit_cpu_use           = false
  offer_ha                = true

  gpu = {
    vgpu_profile_id = data.cloudstack_vgpu_profile.main.id
    count           = 1
    display         = true
  }
}