fix(module: select): multiple select cause switch size flash when init

[WwwHhhYran]

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: Close #8847

What is the new behavior?

当 select 的 nzMode 设为 multiple 或 tags 且 switch 的 nzSize 设为 small 时，switch 组件初始化时不再出现大小闪烁现象（由 default 变为 small）

When nzMode of select is multiple or tags, and nzSize of switch is small, the size flashing (change from default to small) of switch no longer occurs at initialization.

Does this PR introduce a breaking change?

• Yes
• No

Other information

[zorro-bot]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.93%. Comparing base (79e8d5a) to head (73a8697).
Report is 3 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8851      +/-   ##
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- Coverage   91.94%   91.93%   -0.01%     
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  Files         537      537              
  Lines       18455    18458       +3     
  Branches     2816     2816              
==========================================
+ Hits        16968    16970       +2     
- Misses       1183     1184       +1     
  Partials      304      304              

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[Laffery]

Hi there 👋, thanks for your first contribution to ng-zorro !

What about wrapping the regAnimFrame in the syncMirrorWidth method instead?

syncMirrorWidth(): void {
	reqAnimFrame(() => {
		// ...
	});
}

[Laffery]

Further more, even though we have encapsulated the reqAnimFrame method to polyfill requestAnimationFrame in various browser, there are only a few of components had taken advantage of this method.
It would be great to pull a request to upgrade these usage for reqAnimFrame if you like !

[WwwHhhYran]

Hi there 👋, thanks for your first contribution to ng-zorro !

What about wrapping the regAnimFrame in the syncMirrorWidth method instead?

syncMirrorWidth(): void {
	reqAnimFrame(() => {
		// ...
	});
}

Thank you for your suggestion. Obviously, this is a more elegant way of coding. I have made the necessary modifications, thanks very much ! @Laffery

[WwwHhhYran]

Further more, even though we have encapsulated the reqAnimFrame method to polyfill requestAnimationFrame in various browser, there are only a few of components had taken advantage of this method. It would be great to pull a request to upgrade these usage for reqAnimFrame if you like !

I'm willing and will try my best to do that 🤝