[OpenVINO backend] update convert_to_tensor

[Mohamed-Ashraf273]

@fchollet
@rkazants

[divyashreepathihalli]

/gemini review

[gemini-code-assist]

Code Review

The pull request updates the convert_to_tensor function in the OpenVINO backend to handle ov.Output types. A suggestion has been made to add a check for None inputs to prevent potential errors.

[rkazants]

@fchollet, looks good to me. Recommend to merge

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 82.80%. Comparing base (d55a767) to head (30b8779).

Files with missing lines	Patch %	Lines
keras/src/backend/openvino/core.py	0.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #21469      +/-   ##
==========================================
- Coverage   82.81%   82.80%   -0.01%     
==========================================
  Files         565      565              
  Lines       55520    55522       +2     
  Branches     8664     8665       +1     
==========================================
  Hits        45977    45977              
- Misses       7428     7429       +1     
- Partials     2115     2116       +1     

Flag	Coverage Δ
keras	82.61% <0.00%> (-0.01%)	⬇️
keras-jax	63.38% <0.00%> (-0.01%)	⬇️
keras-numpy	58.58% <0.00%> (-0.01%)	⬇️
keras-openvino	33.99% <0.00%> (-0.01%)	⬇️
keras-tensorflow	63.83% <0.00%> (-0.01%)	⬇️
keras-torch	63.50% <0.00%> (-0.01%)	⬇️

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