feat(module:autocomplete): support values whit object type

[hsuanxyz]

close #4981

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
[x] 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: #4981

What is the new behavior?

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

[zorro-bot]

This preview will be available after the AzureCI is passed.

[codecov]

Codecov Report

Merging #4996 into master will decrease coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #4996      +/-   ##
==========================================
- Coverage   91.48%   91.46%   -0.02%     
==========================================
  Files         548      548              
  Lines       13771    13775       +4     
  Branches     2044     2045       +1     
==========================================
+ Hits        12598    12599       +1     
- Misses        710      714       +4     
+ Partials      463      462       -1     

Impacted Files	Coverage Δ
...ts/auto-complete/autocomplete-trigger.directive.ts	95.75% <100.00%> (+0.05%)	⬆️
components/auto-complete/autocomplete.component.ts	94.28% <100.00%> (+0.11%)	⬆️
components/table/src/table/tbody.component.ts	85.71% <0.00%> (-14.29%)	⬇️
components/table/src/table/tr-measure.component.ts	86.95% <0.00%> (-13.05%)	⬇️
components/core/util/text-measure.ts	91.30% <0.00%> (+1.73%)	⬆️

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