fix(VirtualInput): should not block of long press

[zombieJ]

长按后聚焦元素不在 root 上，关闭逻辑里加一个聚焦让它可以正确触发。

close #6474

PS: 测试中调用 blur 事件即便 activeElement 不在元素上也能触发，看起来测试中没有办法去模拟真实的场景。

[codecov]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (dcff0b8) 92.28% compared to head (eb11ebf) 92.24%.

Files	Patch %	Lines
src/components/number-keyboard/number-keyboard.tsx	0.00%	2 Missing ⚠️
src/components/virtual-input/virtual-input.tsx	80.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6477      +/-   ##
==========================================
- Coverage   92.28%   92.24%   -0.04%     
==========================================
  Files         316      316              
  Lines        6866     6872       +6     
  Branches     1720     1722       +2     
==========================================
+ Hits         6336     6339       +3     
- Misses        494      497       +3     
  Partials       36       36              

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[github-actions]

PR preview has been successfully built and deployed to https://antd-mobile-preview-pr-6477.surge.sh

[wangshihao111]

LGTM

[github-actions]

Size Change: +90 B (0%)

Total Size: 367 kB

Filename	Size	Change
./lib/bundle/antd-mobile.compatible.umd.js	195 kB	+48 B (0%)
./lib/bundle/antd-mobile.umd.js	153 kB	+42 B (0%)

ℹ️ View Unchanged

Filename	Size
./lib/bundle/css-vars-patch.css	1.42 kB
./lib/bundle/style.css	18 kB

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