feat: redesign the input-number

[HyperLife1119]

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

旧版组件的开发体验不佳，与 antd 标准实现差异大。

What is the new behavior?

1. 将旧版组件的导出点整体移动到 ng-zorro-antd/input-number-legacy（样式文件除外）
2. 为了兼容新旧组件同时使用：
   • 将旧版组件选择器修改为 nz-input-number-legacy
   • 将 NzInputNumberComponent 重命名为 NzInputNumberLegacyComponent
   • 将 NzInputNumberModule 重命名为 NzInputNumberLegacyModule
3. 弃用 NzInputNumberLegacyModule 及其包含的所有组件与指令
4. input 模块新增如下指令：
   • NzInputPrefixDirective
   • NzInputSuffixDirective
   • NzInputAddonBeforeDirective
   • NzInputAddonAfterDirective
     由于未来 input 模块也需要用到这些指令，并且 input-number 隶属于 input，所以 input-number 也将从 input 模块中复用这些指令。
5. 新版组件在使用 affixes 与 addons 时：
   • 不再需要 <nz-input-number-group>
   • 不再需要编写繁琐的 <ng-template>

<!-- Basic -->
<nz-input-number />

<!-- Custom handler icons -->
<nz-input-number>
  <nz-icon nzInputNumberUpIcon />
  <nz-icon nzInputNumberDownIcon />
</nz-input-number>

<!-- With affixes -->
<nz-input-number>
  <span nzInputPrefix>Prefix</span>
  <span nzInputSuffix>Suffix</span>
</nz-input-number>

<!-- With addons -->
<nz-input-number>
  <span nzInputAddonBefore>Before</span>
  <span nzInputAddonAfter>After</span>
</nz-input-number>

<!-- Mix -->
<nz-input-number>
  <span nzInputPrefix>Prefix</span>
  <span nzInputSuffix>Suffix</span>
  <span nzInputAddonBefore>Before</span>
  <span nzInputAddonAfter>After</span>
</nz-input-number>

Does this PR introduce a breaking change?

• Yes
• No

Other information

[zorro-bot]

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[codecov]

Codecov Report

Attention: Patch coverage is 98.64865% with 6 lines in your changes missing coverage. Please review.

Project coverage is 91.88%. Comparing base (c3ab3ba) to head (93791a6).
Report is 4 commits behind head on master.

Files with missing lines	Patch %	Lines
components/input-number/input-number.component.ts	97.02%	4 Missing and 1 partial ⚠️
...ents/input-number-legacy/input-number.component.ts	99.61%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8901      +/-   ##
==========================================
+ Coverage   91.84%   91.88%   +0.04%     
==========================================
  Files         548      552       +4     
  Lines       19305    19491     +186     
  Branches     2862     2893      +31     
==========================================
+ Hits        17730    17909     +179     
- Misses       1260     1265       +5     
- Partials      315      317       +2     

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[Laffery]

LGTM