workaround vulkan padding stall with new nvidia driver

[nihui]

No description provided.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.00%. Comparing base (39c055d) to head (64599e8).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5953      +/-   ##
==========================================
+ Coverage   95.34%   96.00%   +0.66%     
==========================================
  Files         813      763      -50     
  Lines      268476   246444   -22032     
==========================================
- Hits       255974   236610   -19364     
+ Misses      12502     9834    -2668     

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[github-actions]

The binary size change of libncnn.so (bytes)

architecture	base size	pr size	difference
x86_64	16456672	16456672	0 😘
armhf	7330908	7330908	0 😘
aarch64	10703704	10703704	0 😘

[Copilot]

Copilot wasn't able to review any files in this pull request.

Files not reviewed (2)

• src/layer/vulkan/shader/padding_pack1to4.comp: Language not supported
• src/layer/vulkan/shader/padding_pack1to8.comp: Language not supported