fix(module: carousel): fix carouselslide no width when vertical:false

[nuonuoge]

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-mobile/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
[ ] 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
[x] No

Other information

[codecov]

Codecov Report

Merging #67 into master will increase coverage by 0.35%.
The diff coverage is 88.88%.

@@            Coverage Diff             @@
##           master      #67      +/-   ##
==========================================
+ Coverage   85.92%   86.28%   +0.35%     
==========================================
  Files         209      209              
  Lines        6894     6898       +4     
  Branches      974      974              
==========================================
+ Hits         5924     5952      +28     
+ Misses        559      552       -7     
+ Partials      411      394      -17

Impacted Files	Coverage Δ
components/carousel/carousel.component.ts	76.83% <88.88%> (+9.3%)	⬆️

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