fix(module:carousel): wrong dot postion when left and right

[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

What kind of change does this PR introduce?

• 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 nzDotPosition is set to right or left the position is of dots is not correct

Issue Number: N/A

What is the new behavior?

Dot position is fixed

Does this PR introduce a breaking change?

• Yes
• No

Other information

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.27%. Comparing base (025f9f9) to head (25acedf).
⚠️ Report is 3 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #9358      +/-   ##
==========================================
+ Coverage   92.09%   92.27%   +0.17%     
==========================================
  Files         561      561              
  Lines       19657    19654       -3     
  Branches     3005     3006       +1     
==========================================
+ Hits        18104    18135      +31     
+ Misses       1216     1188      -28     
+ Partials      337      331       -6     

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[WwwHhhYran]

LGTM

[Laffery]

LGTM