[API Compatibility] Support arg `closure` for `paddle.optimizer.optimizer.step`#78570

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algorithm1832 wants to merge 6 commits intoPaddlePaddle:developfrom

algorithm1832:improvement_optimizer_step

Commits on Apr 2, 2026

support arg closure for optimizer.step
algorithm1832
committed

Commits on Apr 10, 2026

add AdamW and Optimizer class test for closure
algorithm1832
committed