[OpenVINO BACKEND] - feat: implement numpy.nonzero for openvino backend

[11happy]

Overview:

• fixes [Good First Issue][Keras 3 OpenVINO Backend]: Support numpy.nonzero operation openvinotoolkit/openvino#30121

Testing:

• All Tests Passing
  

CC:

• @rkazants

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.58%. Comparing base (c7b6b42) to head (5ddafe0).

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #21163   +/-   ##
=======================================
  Coverage   82.58%   82.58%           
=======================================
  Files         564      564           
  Lines       54398    54401    +3     
  Branches     8449     8449           
=======================================
+ Hits        44926    44929    +3     
  Misses       7397     7397           
  Partials     2075     2075           

Flag	Coverage Δ
keras	82.39% <100.00%> (+<0.01%)	⬆️
keras-jax	63.80% <0.00%> (-0.01%)	⬇️
keras-numpy	58.91% <0.00%> (-0.01%)	⬇️
keras-openvino	32.93% <100.00%> (+<0.01%)	⬆️
keras-tensorflow	64.21% <0.00%> (-0.01%)	⬇️
keras-torch	63.89% <0.00%> (-0.01%)	⬇️

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[11happy]

openvino tests are passing : ) ,
pre-commit is failing due openvino.runtime will be deprecated issue, openvino.runtime is utilised in 38 places in 7 files so should I replace them all ?
Thank you

[rkazants]

openvino tests are passing : ) , pre-commit is failing due openvino.runtime will be deprecated issue, openvino.runtime is utilised in 38 places in 7 files so should I replace them all ? Thank you

please try to merge latest master

[11happy]

I have rebased my branch on latest master.
Thank you

[rkazants]

@fchollet, looks good to me. Recommend to merge.

[fchollet]

Thank you!

[fchollet]

This branch has conflicts that must be resolved

Please resolve merge conflicts in keras/src/backend/openvino/excluded_concrete_tests.txt.

[rkazants]

This branch has conflicts that must be resolved

Please resolve merge conflicts in keras/src/backend/openvino/excluded_concrete_tests.txt.

@11happy, fyi

[11happy]

Done : )
resolved the merge conflict.
Thank you

[rkazants]

@fchollet, looks good to me. Recommend to merge.