[cases](regression-test) Add backup & restore test case #26623

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xiaokang merged 2 commits intoapache:branch-2.0from

w41ter:pick/backup_restore_case

Nov 9, 2023

Commits on Nov 9, 2023

[cases](regression-test) Add backup & restore test case of dup table (#26490)

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[cases](regression-test) add unique and duplicate backup and restore … (#26491)

felixwluo
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