Use a SliceOP to copy data from input to output node

[sgbihu]

Details:

• Place Slice Operator at the graph
• Let EliminateSlice pass to optimize out the Slice if needs.

Tickets:

• CVS-173262

[Copilot]

Pull Request Overview

This PR replaces the direct pass-through behavior of the ONNX Identity operator with a Slice operation that copies data from input to output. The change addresses a specific issue where data may not be properly copied when Identity connects directly from input to result nodes.

• Replaces direct output forwarding with a Slice operation using full range parameters
• Adds necessary includes for Slice and Constant operations
• Includes comments explaining the optimization strategy via EliminateSlice pass

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