feat(module:drawer): support top and bottom placement

[hsuanxyz]

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: #2015

What is the new behavior?

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

⌛️ ant-design 3.9.0

[codecov]

Codecov Report

Merging #2039 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #2039      +/-   ##
==========================================
+ Coverage   96.01%   96.02%   +<.01%     
==========================================
  Files         470      470              
  Lines       11424    11436      +12     
  Branches     1515     1519       +4     
==========================================
+ Hits        10969    10981      +12     
  Misses        131      131              
  Partials      324      324

Impacted Files	Coverage Δ
components/core/util/convert.ts	88.88% <100%> (+1.38%)	⬆️
components/drawer/nz-drawer.component.ts	97.26% <100%> (+0.43%)	⬆️

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