fix(module:cascader): fix broken nzChangeOnSelect

[rppig42]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[x] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Application (the showcase website) / infrastructure changes
[ ] Other... Please describe:

What is the current behavior?

nzChangeOnSelect is broken

Issue Number: #6048

What is the new behavior?

nzChangeOnSelect works well

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

this bug is introduced by https://github.com/NG-ZORRO/ng-zorro-antd/pull/6023/files .

When clicking a none leaf node, the menu should only disappear when combining nzChangeOnSelect and nzExpandTrigger === 'hover'

[zorro-bot]

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[codecov]

Codecov Report

Merging #6049 (949b86c) into master (679be27) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #6049   +/-   ##
=======================================
  Coverage   89.95%   89.95%           
=======================================
  Files         465      465           
  Lines       14042    14042           
  Branches     2307     2307           
=======================================
+ Hits        12631    12632    +1     
  Misses        863      863           
+ Partials      548      547    -1     

Impacted Files	Coverage Δ
components/cascader/cascader.component.ts	94.67% <100.00%> (ø)
components/tabs/tab-nav-bar.component.ts	81.62% <0.00%> (-0.71%)	⬇️
components/time-picker/time-holder.ts	95.78% <0.00%> (+1.05%)	⬆️
components/core/util/text-measure.ts	91.30% <0.00%> (+1.73%)	⬆️

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[wzhudev]

LGTM