Optimize reduce

[sunnycase]

• Support any reduction axes
• Add micro-reduce kernel
• Add micro-reduce unroll policy

[github-actions]

Test Results

5 113 tests  ±0   5 113 ✅ ±0   1h 34m 39s ⏱️ -28s
    5 suites ±0       0 💤 ±0 
    5 files   ±0       0 ❌ ±0 

Results for commit 0277d26. ± Comparison against base commit b72ba28.

♻️ This comment has been updated with latest results.

[codecov]

Codecov Report

Attention: Patch coverage is 66.66667% with 1 line in your changes missing coverage. Please review.

Project coverage is 69.66%. Comparing base (2498b1b) to head (0277d26).
Report is 30 commits behind head on dev/3.0.

Files with missing lines	Patch %	Lines
...ncase.Modules.CPU/CodeGen/CPU/CSourceExtensions.cs	50.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           dev/3.0    #1245      +/-   ##
===========================================
- Coverage    73.26%   69.66%   -3.60%     
===========================================
  Files          706      932     +226     
  Lines        25960    36244   +10284     
  Branches      4229     6250    +2021     
===========================================
+ Hits         19019    25251    +6232     
- Misses        6294    10165    +3871     
- Partials       647      828     +181     

Flag	Coverage Δ
integration	38.41% <66.66%> (-0.91%)	⬇️
unit	63.62% <33.33%> (-1.09%)	⬇️

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