Add DI get GPUModelConfig

[Rachana888]

Summary

• Adds support for retrieving supported GPU model configurations for Dedicated Inference
• Implements GET /v2/dedicated-inferences/gpu-model-config endpoint

Changes

• Added GetGPUModelConfig method to DedicatedInferenceService interface
• Added response types:
  • DedicatedInferenceGPUModelConfigResponse – top-level response containing gpu_model_configs
  • DedicatedInferenceGPUModelConfig – configuration including gpu_slugs, model_slug, model_name, and is_model_gated
• Implemented GetGPUModelConfig method in DedicatedInferenceServiceOp
• Added unit test TestDedicatedInference_GetGPUModelConfig

API Specification

Method	Endpoint	Response
GET	/v2/dedicated-inferences/gpu-model-config	200 OK with GPU model configs

Testing

Command
TestDedicatedInference_GetGPUModelConfig

Results

=== RUN   TestDedicatedInference_GetGPUModelConfig
--- PASS: TestDedicatedInference_GetGPUModelConfig (0.00s)
PASS
ok      github.com/digitalocean/godo    1.454s

Unit Tests Added

• TestDedicatedInference_GetGPUModelConfig – Verifies correct parsing of all response fields