Fix: 修复 run pre/post hook 没有在正确的上下文中运行

[yanyongyu]

related: #1363

[codecov]

Codecov Report

Merging #1391 (75ffaf3) into master (cfbd6f1) will decrease coverage by 0.03%.
The diff coverage is 61.53%.

@@            Coverage Diff             @@
##           master    #1391      +/-   ##
==========================================
- Coverage   85.90%   85.87%   -0.04%     
==========================================
  Files          41       41              
  Lines        3228     3235       +7     
==========================================
+ Hits         2773     2778       +5     
- Misses        455      457       +2     

Flag	Coverage Δ
unittests	85.87% <61.53%> (-0.04%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
nonebot/message.py	39.20% <0.00%> (-0.64%)	⬇️
nonebot/internal/matcher.py	94.05% <96.00%> (+0.11%)	⬆️

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[github-actions]

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