【Cherry-pick】【FlexCheckpoint】add 3D CommGroup State Resharder (#77180)#77262

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xingmingyyj wants to merge 2 commits intoPaddlePaddle:release/3.3from

xingmingyyj:cp_3_3_0108

Commits on Jan 8, 2026

【FlexCheckpoint】add 3D CommGroup State Resharder (#77180)
xingmingyyj
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Commits on Jan 13, 2026

Merge remote-tracking branch 'paddlepaddle/release/3.3' into cp_3_3_0108
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