fix: Fix Disag Examples (#8070)

Signed-off-by: Anna Tchernych <atchernych@nvidia.com>

examples/backends/vllm/deploy/gaie/disagg.yaml

@@ -144,7 +144,7 @@ spec:
             - name: MODEL_PATH
               value: "Qwen/Qwen3-0.6B"
           args:
-          - "python3 -m dynamo.vllm --model $MODEL_PATH --served-model-name $SERVED_MODEL_NAME --tensor-parallel-size 1 --data-parallel-size 1 --kv-transfer-config '{\"kv_connector\":\"NixlConnector\",\"kv_role\":\"kv_both\"}' --gpu-memory-utilization 0.90 --enable-prefix-caching --block-size 16 --kv-events-config '{\"enable_kv_cache_events\":true}'"
+          - "python3 -m dynamo.vllm --model $MODEL_PATH --served-model-name $SERVED_MODEL_NAME --tensor-parallel-size 1 --data-parallel-size 1 --disaggregation-mode decode --kv-transfer-config '{\"kv_connector\":\"NixlConnector\",\"kv_role\":\"kv_both\"}' --gpu-memory-utilization 0.90 --block-size 16"
           command:
           - /bin/sh
           - -c

recipes/llama-3-70b/vllm/disagg-single-node/gaie/deploy.yaml

@@ -163,7 +163,7 @@ spec:
             - name: HF_HOME
               value: /opt/models
           args:
-          - "python3 -m dynamo.vllm --model $MODEL_PATH --served-model-name $SERVED_MODEL_NAME --tensor-parallel-size 4 --data-parallel-size 1 --kv-transfer-config '{\"kv_connector\":\"NixlConnector\",\"kv_role\":\"kv_both\"}' --gpu-memory-utilization 0.90 --enable-prefix-caching --block-size 128 --kv-events-config '{\"enable_kv_cache_events\":true}'"
+          - "python3 -m dynamo.vllm --model $MODEL_PATH --served-model-name $SERVED_MODEL_NAME --tensor-parallel-size 4 --data-parallel-size 1 --disaggregation-mode decode --kv-transfer-config '{\"kv_connector\":\"NixlConnector\",\"kv_role\":\"kv_both\"}' --gpu-memory-utilization 0.90 --block-size 128"
           command:
           - /bin/sh
           - -c