perf(module:carousel): do not run change detection on non-handled keydown events

[arturovt]

PR Checklist

• 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

[x] Refactoring (no functional changes, no api changes)

Does this PR introduce a breaking change?

[ ] Yes
[x] No

[zorro-bot]

This preview will be available after the AzureCI is passed.

[codecov]

Codecov Report

Merging #7097 (4324122) into master (d78a8d2) will decrease coverage by 0.00%.
The diff coverage is 88.23%.

❗ Current head 4324122 differs from pull request most recent head 6fb1f6a. Consider uploading reports for the commit 6fb1f6a to get more accurate results

@@            Coverage Diff             @@
##           master    #7097      +/-   ##
==========================================
- Coverage   89.63%   89.62%   -0.01%     
==========================================
  Files         488      488              
  Lines       15873    15879       +6     
  Branches     2446     2446              
==========================================
+ Hits        14227    14232       +5     
- Misses       1014     1015       +1     
  Partials      632      632              

Impacted Files	Coverage Δ
components/carousel/carousel.component.ts	89.63% <88.23%> (+0.39%)	⬆️
components/time-picker/time-holder.ts	95.78% <0.00%> (-1.06%)	⬇️

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[simplejason]

LGTM