feat(module:collapse): change nzExpandIconPosition type from left | right to start | end

[HyperLife1119]

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

https://4x.ant.design/components/collapse-cn/#:~:text=%2D-,expandIconPosition,-%E8%AE%BE%E7%BD%AE%E5%9B%BE%E6%A0%87

What is the new behavior?

Parameter types are aligned with antd.

Does this PR introduce a breaking change?

[x] Yes
[ ] No

Other information

[zorro-bot]

This preview will be available after the AzureCI is passed.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.51%. Comparing base (f668b87) to head (e33d23b).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8561      +/-   ##
==========================================
- Coverage   91.52%   91.51%   -0.02%     
==========================================
  Files         535      535              
  Lines       18424    18424              
  Branches     2814     2814              
==========================================
- Hits        16862    16860       -2     
- Misses       1244     1245       +1     
- Partials      318      319       +1     

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[OriginRing]

LGTM

[Laffery]

document should be updated as well :)

[HyperLife1119]

document should be updated as well :)

done

[Laffery]

LGTM