[FLINK-37021][state/forst] Implement fast cp/restore for ForSt StateBackend#25924

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AlexYinHan wants to merge 7 commits intoapache:masterfrom AlexYinHan:yh/fast_cp_on_fast_rescale

+1,205-296

Commits on Jan 7, 2025

[FLINK-37021][state/forst] Bump forstjni to 0.1.5
fredia
committed
[FLINK-37021][state/forst] Implement fast rescaling for ForStKeyedStateBackend
fredia
committed

Commits on Jan 8, 2025

fast cp and restore
yinhan.yh
committed

Commits on Jan 9, 2025

Add test cases and fix bugs
yinhan.yh
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Add licenses for new files
yinhan.yh
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Refine log code
yinhan.yh
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deal with state handles not backed by files.
yinhan.yh
committed