Fix the empty const make the OV throw exception

[sgbihu]

Details:

• The empty const makes load memory throw exception.

Tickets:

• CVS-174814

[Copilot]

Pull Request Overview

This PR fixes an issue where empty constants with zero-size external data were causing OpenVINO to throw exceptions during memory loading. The fix handles edge cases for zero-size external data in ONNX models.

• Added validation logic to properly handle zero-size external data scenarios
• Improved scalar tensor detection to differentiate between empty tensors and scalars
• Added test coverage for the zero-size external data edge case

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
src/frontends/onnx/frontend/src/utils/tensor_external_data.cpp	Updated validation logic for external memory data loading to handle zero-size cases
src/frontends/onnx/frontend/src/core/tensor.hpp	Refined scalar tensor detection and external data validation
src/frontends/onnx/tests/onnx_reader_external_data.cpp	Added test case for zero-size external data scenario
src/frontends/onnx/tests/models/external_data/external_data_0_size.prototxt	Added test model with zero-size external data

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[Copilot]

Pull Request Overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

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[Copilot]

Pull Request Overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

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[Copilot]

Pull Request Overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

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[Copilot]

Pull Request Overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

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[Copilot]

Pull Request Overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated no new comments.

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