enhance: delete drag lock. add leave view back to zoom

[1587315093]

resolve #6310

主要改动就是删除了 dragLockRef 这个拖动锁，然后把 slide 的冒泡删了，不然外层的· drag不触发。

然后加这段代码是最小改动，离开视图回到原始缩放

 const [inView] = useInViewport(controlRef)

  useEffect(() => {
    !inView &&
      api.start({
        matrix: mat.create(),
      })
  }, [inView])

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.47% 🎉

Comparison is base (e8f6c15) 91.05% compared to head (fa2ad8f) 91.53%.
Report is 14 commits behind head on feature.

Additional details and impacted files

@@             Coverage Diff             @@
##           feature    #6317      +/-   ##
===========================================
+ Coverage    91.05%   91.53%   +0.47%     
===========================================
  Files          307      310       +3     
  Lines         6597     6661      +64     
  Branches      1644     1654      +10     
===========================================
+ Hits          6007     6097      +90     
+ Misses         544      531      -13     
+ Partials        46       33      -13     

Files Changed	Coverage Δ
src/components/image-viewer/image-viewer.tsx	100.00% <100.00%> (+4.65%)	⬆️
src/components/image-viewer/slide.tsx	65.74% <100.00%> (+7.33%)	⬆️
src/components/image-viewer/slides.tsx	90.69% <100.00%> (+0.22%)	⬆️

... and 48 files with indirect coverage changes

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[github-actions]

PR preview has been successfully built and deployed to https://antd-mobile-preview-pr-6317.surge.sh

[1587315093]

考古到一个相关的PR #5701，应该选一下实现方式吧

[miracles1919]

删除锁会导致缩小、放大的操作误认为滑动的