Add inner op

[IMvision12]

Inner product of two arrays.

@fchollet

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 95.55556% with 2 lines in your changes missing coverage. Please review.

Project coverage is 82.17%. Comparing base (a93828a) to head (085e336).
Report is 7 commits behind head on master.

Files with missing lines	Patch %	Lines
keras/api/_tf_keras/keras/ops/__init__.py	0.00%	1 Missing ⚠️
keras/api/_tf_keras/keras/ops/numpy/__init__.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #20532      +/-   ##
==========================================
+ Coverage   82.11%   82.17%   +0.05%     
==========================================
  Files         515      515              
  Lines       47806    47956     +150     
  Branches     7490     7500      +10     
==========================================
+ Hits        39258    39409     +151     
+ Misses       6736     6734       -2     
- Partials     1812     1813       +1     

Flag	Coverage Δ
keras	82.02% <95.55%> (+0.05%)	⬆️
keras-jax	65.11% <42.22%> (+0.05%)	⬆️
keras-numpy	60.11% <51.11%> (+0.07%)	⬆️
keras-tensorflow	66.09% <53.33%> (+0.05%)	⬆️
keras-torch	65.05% <55.55%> (+0.06%)	⬆️

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[fchollet]

Thanks for the PR!

[fchollet]

LGTM, thanks! Please update the API files via sh shell/api_gen.sh. This will also fix CI.