feat(module:input): input-otp supports keyboard control positioning

[iaosee]

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?

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

Attention: Patch coverage is 42.85714% with 4 lines in your changes missing coverage. Please review.

Project coverage is 92.08%. Comparing base (2c7c402) to head (c0eb614).
Report is 11 commits behind head on master.

Files with missing lines	Patch %	Lines
components/input/input-otp.component.ts	42.85%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #9268      +/-   ##
==========================================
- Coverage   92.11%   92.08%   -0.03%     
==========================================
  Files         561      561              
  Lines       19609    19616       +7     
  Branches     3101     3104       +3     
==========================================
+ Hits        18062    18064       +2     
- Misses       1207     1211       +4     
- Partials      340      341       +1     

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[Laffery]

LGTM