[WIP][ci] chore: change two-node Ascend RayJob E2E workflow from A2 to A3

[wangdongleix]

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[gemini-code-assist]

Code Review

This pull request updates the number of GPUs per node from 4 to 8 in the multinode PPO training script for Qwen3. The reviewer noted that the experiment name still references the old 2x4 configuration and suggested updating it to reflect the new 2x8 setup for consistency.

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[gemini-code-assist]

The number of GPUs per node has been increased to 8, which changes the setup to a 2x8 multinode configuration. However, trainer.experiment_name on line 52 is still set to 'qwen3_06b_fsdp_multinode_2x4'. Please update the experiment name to reflect the new 2x8 configuration (e.g., 'qwen3_06b_fsdp_multinode_2x8') to ensure consistent and accurate experiment tracking.

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