feat(module:table): nzExpand supports custom icon

[OriginRing]

fix: #7882

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
[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: N/A

What is the new behavior?

Does this PR introduce a breaking change?

[ ] Yes
[ ] No

Other information

[zorro-bot]

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[codecov]

Codecov Report

Merging #7886 (b212616) into master (e22433a) will decrease coverage by 0.03%.
The diff coverage is 100.00%.

❗ Current head b212616 differs from pull request most recent head ef63842. Consider uploading reports for the commit ef63842 to get more accurate results

@@            Coverage Diff             @@
##           master    #7886      +/-   ##
==========================================
- Coverage   91.78%   91.75%   -0.03%     
==========================================
  Files         509      509              
  Lines       17437    17438       +1     
  Branches     2771     2771              
==========================================
- Hits        16004    16001       -3     
- Misses       1134     1137       +3     
- Partials      299      300       +1     

Impacted Files	Coverage Δ
components/table/src/cell/td-addon.component.ts	83.87% <100.00%> (+0.53%)	⬆️

... and 1 file with indirect coverage changes

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[lw-like]

Is there another way to change expand icon? I'm strictly interested in this topic.