[fully_async] fix: add fully async grpo qwen3-235b npu script in main branch

[wangshuyang31]

What does this PR do?

Re-apply override_transformer_config in engine worker (partially roll back #5583), because that PR causes certain patches to not be applied properly.

Add fully async grpo qwen3-235b npu script

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Code Review

This pull request introduces a new shell script for running GRPO training with the Qwen3-235B model using Megatron on NPU hardware. It also adds support for NPU-specific MindSpeed patching in the engine workers by conditionally importing and applying a repatch function based on the transformer configuration. I have no feedback to provide.

[wuxibin89]

Duplicate with #5967

[wangshuyang31]

Duplicate with #5967

thanks, I will check it out