chore: recordings for fireworks (inference + openai) (#3573)

# What does this PR do?

recorded for: ./scripts/integration-tests.sh --stack-config
server:ci-tests --suite base --setup fireworks --subdirs inference
--pattern openai

## Test Plan

./scripts/integration-tests.sh --stack-config server:ci-tests --suite
base --setup fireworks --subdirs inference --pattern openai

tests/integration/recordings/responses/8cdb7e65fcfe.json

@@ -0,0 +1,39 @@
+{
+  "request": {
+    "method": "POST",
+    "url": "https://api.fireworks.ai/inference/v1/v1/embeddings",
+    "headers": {},
+    "body": {
+      "model": "accounts/fireworks/models/qwen3-embedding-8b",
+      "input": "Test dimensions parameter",
+      "encoding_format": "base64",
+      "dimensions": 16
+    },
+    "endpoint": "/v1/embeddings",
+    "model": "accounts/fireworks/models/qwen3-embedding-8b"
+  },
+  "response": {
+    "body": {
+      "__type__": "openai.types.create_embedding_response.CreateEmbeddingResponse",
+      "__data__": {
+        "data": [
+          {
+            "embedding": "AABuvwAApkAAAAnAAAAwPgAAEMAAAFa/AABUvwAAlD8AABVAAACBvwAAQMAAAINAAABWPwAA0D0AAAFAAACLvw==",
+            "index": 0,
+            "object": "embedding",
+            "raw_output": null
+          }
+        ],
+        "model": "accounts/fireworks/models/qwen3-embedding-8b",
+        "object": "list",
+        "usage": {
+          "prompt_tokens": 5,
+          "total_tokens": 5,
+          "completion_tokens": 0
+        },
+        "perf_metrics": null
+      }
+    },
+    "is_streaming": false
+  }
+}