fix(module:table): fix table header scroll when fixed change

[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

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[codecov]

Codecov Report

Merging #3806 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master   #3806      +/-   ##
=========================================
+ Coverage   95.39%   95.4%   +<.01%     
=========================================
  Files         709     709              
  Lines       14586   14587       +1     
  Branches     1924    1924              
=========================================
+ Hits        13915   13917       +2     
  Misses        243     243              
+ Partials      428     427       -1

Impacted Files	Coverage Δ
components/table/nz-table.component.ts	93.08% <100%> (+0.04%)	⬆️
components/time-picker/time-holder.ts	97.26% <0%> (+0.68%)	⬆️

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