fix(input-number): click the button can modify the data when mode is …

[bsuooo]

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• New feature
• Bug fix
• Enhancement
• Component style change
• Typescript definition change
• Documentation change
• Coding style change
• Refactoring
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Changelog

Component	Changelog(CN)	Changelog(EN)	Related issues
input-number	readonly时隐藏button	hide button when readonly	#3138

Checklist:

• Test suite passes (npm run test)
• Provide changelog for relevant changes (e.g. bug fixes and new features) if applicable.
• Changes are submitted to the appropriate branch (e.g. features should be submitted to feature branch and others
  should be submitted to main branch)

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[oljc]

@bsuooo 直接隐藏的方式不太合适，感谢贡献！#3314