Optimize reduce

[sunnycase]

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

[github-actions[bot]]

Test Results

5 113 tests  ±0   5 113 :white_check_mark: ±0   1h 34m 39s :stopwatch: -28s     5 suites ±0       0 :zzz: ±0      5 files   ±0       0 :x: ±0 

Results for commit 0277d26e. ± Comparison against base commit b72ba289.

:recycle: This comment has been updated with latest results.

[codecov[bot]]

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 :warning:

Additional details and impacted files

```diff @@ 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](https://app.codecov.io/gh/kendryte/nncase/pull/1245/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=kendryte) | Coverage Δ | | |---|---|---| | [integration](https://app.codecov.io/gh/kendryte/nncase/pull/1245/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=kendryte) | `38.41% <66.66%> (-0.91%)` | :arrow_down: | | [unit](https://app.codecov.io/gh/kendryte/nncase/pull/1245/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=kendryte) | `63.62% <33.33%> (-1.09%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=kendryte#carryforward-flags-in-the-pull-request-comment) to find out more.

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