Merge branch '521034-claude-3-7-model-upgrade' into 'main'

chore: add new model configuration file for claude 3.7

See merge request gitlab-org/modelops/applied-ml/code-suggestions/ai-assist!2033

ai_gateway/prompts/model_configs/claude_3_7.yml

+name: claude-3-7-sonnet-20250219
+params:
+  temperature: 0.0
+  max_tokens: 4_096
+  max_retries: 1
+  model_class_provider: anthropic