fix(module:tree): fix tree animation

[vthinkxie]

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?

[ ] 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?

Issue Number: N/A

What is the new behavior?

Does this PR introduce a breaking change?

[ ] Yes
[ ] No

Other information

[zorro-bot]

This preview will be available after the AzureCI is passed.

[codecov]

Codecov Report

Merging #4973 into master will decrease coverage by 0.15%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #4973      +/-   ##
==========================================
- Coverage   91.44%   91.29%   -0.16%     
==========================================
  Files         535      535              
  Lines       13740    13709      -31     
  Branches     2052     2040      -12     
==========================================
- Hits        12565    12515      -50     
- Misses        708      730      +22     
+ Partials      467      464       -3     

Impacted Files	Coverage Δ
components/core/animation/collapse.ts	100.00% <ø> (ø)
components/tree/nz-tree-indent.component.ts	100.00% <ø> (+7.69%)	⬆️
components/tree/nz-tree-node.component.ts	90.15% <100.00%> (-2.12%)	⬇️
components/tree/nz-tree.component.ts	94.41% <100.00%> (+0.06%)	⬆️
components/core/tree/nz-tree-base-node.ts	50.54% <0.00%> (-10.44%)	⬇️
...mponents/date-picker/date-range-popup.component.ts	90.21% <0.00%> (-1.67%)	⬇️
components/date-picker/lib/abstract-table.ts	89.28% <0.00%> (-0.72%)	⬇️
components/core/tree/nz-tree-base.service.ts	81.25% <0.00%> (-0.37%)	⬇️
...omponents/date-picker/calendar-footer.component.ts	95.83% <0.00%> (-0.17%)	⬇️
... and 5 more

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