Fix TOSA RESCALE operands in tensor image aliasing sample

[bartosz-muszarski-arm]

Change fixes crashing tensor_image_aliasing sample on strict compiler implementations

Problem

• the graph spirv used invalid RESCALE operands: rounding_mode = 0, and an i32 input zero-point for an i16 input
• this is invalid per spec https://github.khronos.org/SPIRV-Registry/extended/TOSA.001000.1.html#RESCALE
• strict graph compilers reject those operand/type combinations during graph pipeline creation.

Proposed fix

• use SINGLE_ROUND (value 1), provide a rank-1 i16 zero-point tensor for the i16 RESCALE and regenerate the checked-in SPIR-V binary

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