fix(comp:cascader): the cloned node should have a unique key

[danranVm]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines
• Tests for the changes have been added/updated or not needed
• Docs and demo have been added/updated or not needed

What is the current behavior?

复制节点的时候，没有使用唯一的 key, 会导致特定场景下，组件无法销毁的情况。

What is the new behavior?

Other information

[idux-bot]

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[codecov]

Codecov Report

Merging #940 (119c1ef) into main (7161d96) will increase coverage by 0.00%.
The diff coverage is 100.00%.

❗ Current head 119c1ef differs from pull request most recent head 008d9a2. Consider uploading reports for the commit 008d9a2 to get more accurate results

@@           Coverage Diff           @@
##             main     #940   +/-   ##
=======================================
  Coverage   93.23%   93.23%           
=======================================
  Files         683      683           
  Lines       67031    67033    +2     
  Branches     7910     7910           
=======================================
+ Hits        62498    62500    +2     
  Misses       4533     4533           

Impacted Files	Coverage Δ
packages/components/carousel/src/Carousel.tsx	100.00% <100.00%> (ø)
...components/carousel/src/composables/useAutoplay.ts	100.00% <100.00%> (ø)
...ges/components/carousel/src/composables/useWalk.ts	100.00% <100.00%> (ø)
packages/components/carousel/src/types.ts	100.00% <100.00%> (ø)
packages/components/config/src/types.ts	100.00% <100.00%> (ø)

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