[OpenVINO backend] Support numpy.empty

[arkhamHack]

Hi, @rkazants, could you review this pr? This would close openvinotoolkit/openvino#29357

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 55.55556% with 4 lines in your changes missing coverage. Please review.

Project coverage is 82.43%. Comparing base (3820c0f) to head (98b25f1).

Files with missing lines	Patch %	Lines
keras/src/backend/openvino/numpy.py	55.55%	2 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #21010      +/-   ##
==========================================
- Coverage   82.44%   82.43%   -0.01%     
==========================================
  Files         562      562              
  Lines       53643    53652       +9     
  Branches     8321     8324       +3     
==========================================
+ Hits        44225    44230       +5     
- Misses       7380     7382       +2     
- Partials     2038     2040       +2     

Flag	Coverage Δ
keras	82.25% <55.55%> (-0.01%)	⬇️
keras-jax	63.72% <0.00%> (-0.02%)	⬇️
keras-numpy	58.68% <0.00%> (-0.01%)	⬇️
keras-openvino	32.64% <55.55%> (+<0.01%)	⬆️
keras-tensorflow	64.17% <0.00%> (-0.02%)	⬇️
keras-torch	63.76% <0.00%> (-0.02%)	⬇️

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[arkhamHack]

Also, do let me know if any improvements needed regarding the logic, and what changes might be needed to increase code coverage. @rkazants
Thanks.