fix(module:time-picker): place ViewChild decorator on correct field

[lppedd]

This PR fixes an issue with Ivy compatibility.

• 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:

Does this PR introduce a breaking change?

[ ] Yes
[X] No

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[codecov]

Codecov Report

Merging #4156 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #4156      +/-   ##
==========================================
+ Coverage   92.27%   92.28%   +<.01%     
==========================================
  Files         517      517              
  Lines       10961    10962       +1     
  Branches     1985     1985              
==========================================
+ Hits        10114    10116       +2     
+ Misses        422      421       -1     
  Partials      425      425

Impacted Files	Coverage Δ
...ents/time-picker/nz-time-picker-panel.component.ts	87.78% <100%> (+0.96%)	⬆️
components/time-picker/time-holder.ts	95.61% <0%> (-0.88%)	⬇️

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[Svetomechc]

Now possible to compile with Ivy?

[lppedd]

@Svetomechc no, unfortunately. There is another issue with bindings and base classes

[Svetomechc]

@lppedd what do you think the ETA on that will be? After Angular 9.0 stable release?

[lppedd]

@Svetomechc I have no idea as I'm not part of ng-zorro. I would hope for it being ready for 9 RC in a couple of weeks.