fix(module:datepicker): ngModel not update

[Nicoss54]

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

This PR is a fix for this issue: #7946

[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?

When focus out for a datepicker that show time, the ngModel is not update.

Issue Number: #7946

What is the new behavior?

For a datePicker taht show time, the ngModel is update when focus out

Does this PR introduce a breaking change?

[ ] Yes
[x] No

[zorro-bot]

This preview will be available after the AzureCI is passed.

[Nicoss54]

@simplejason, could please rerun the pipeline, I not have suffisant access to do that. Currently the pipeline failed due to a npm registry issue that is fixed.

[codecov]

Codecov Report

Merging #7948 (11cec56) into master (ad2faf4) will decrease coverage by 0.02%.
The diff coverage is 100.00%.

❗ Current head 11cec56 differs from pull request most recent head 27b0a69. Consider uploading reports for the commit 27b0a69 to get more accurate results

@@            Coverage Diff             @@
##           master    #7948      +/-   ##
==========================================
- Coverage   91.75%   91.74%   -0.02%     
==========================================
  Files         509      509              
  Lines       17445    17447       +2     
  Branches     2683     2685       +2     
==========================================
  Hits        16007    16007              
- Misses       1141     1142       +1     
- Partials      297      298       +1     

Impacted Files	Coverage Δ
components/date-picker/date-picker.component.ts	94.67% <100.00%> (+0.03%)	⬆️

... and 1 file with indirect coverage changes