[ONNX] Fix Loop conversion in case of delegate (#33210)
### Details:
- *Fix Loop conversion in case of delegate*
- *This change fixes `onnx_controlflow_loop_add_input_from_parent_graph`
test failure*
### Tickets:
- *CVS-177884*
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Signed-off-by: Maxim Vafin <maxim.vafin@intel.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
