[ MO ] Fix for remove_op_node_with_data_node

[jane-intel]

Description: Merge operation can have one input coming from input port #1. This caused an issue because remove_op_node_with_data_node used only #0 input which was missing

NOTE: It is reproducible without --static_shape key only because of lack of Merge operation testing variants. The issue is not connected to KSO/reshape.

JIRA: 37868

Code:

• Comments
• Code style (PEP8)
• Transformation generates reshape-able IR
• Transformation preserves original framework node names

Validation:

• Unit tests
• Framework operation tests
• Transformation tests
• e2e model test with an update of ./tests/e2e_oss/utils/reshape_utils.py
• Model Optimizer IR Reader check

Documentation:

• Supported frameworks operations list
• Supported public models list
• New operations specification
• Guide on how to convert the public model
• User guide update