perf: extract expanded row context

[curly210102]

问题描述：设置 scroll.x，resize 或者切换侧边栏时，卡顿明显。Ref: ant-design/ant-design#27775
解决方式：将只在 ExpandedRow 中用到的 fixColumn/fixHeader/componentWidth 单独提取到一个 Context 中
优化结果：固定栏折叠时更改 table 宽度，所需用时 510.4±13.7ms ➜ 104.1±5ms
具体分析：#701

[vercel]

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[codecov]

Codecov Report

Merging #705 (1ad2ed7) into master (ff2a010) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #705   +/-   ##
=======================================
  Coverage   99.67%   99.67%           
=======================================
  Files          31       32    +1     
  Lines         931      935    +4     
  Branches      284      284           
=======================================
+ Hits          928      932    +4     
  Misses          3        3           

Impacted Files	Coverage Δ
src/Body/BodyRow.tsx	97.91% <ø> (ø)
src/context/BodyContext.tsx	100.00% <ø> (ø)
src/Body/ExpandedRow.tsx	100.00% <100.00%> (ø)
src/Body/index.tsx	100.00% <100.00%> (ø)
src/Table.tsx	100.00% <100.00%> (ø)
src/context/ExpandedRowContext.tsx	100.00% <100.00%> (ø)

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[zombieJ]

+ rc-table@7.20.3