onnxruntime

[QNN EP/Quantization] Add MinimumRealRange extra option to quantization script (#18278)

### Description
Adds the extra option `MinimumRealRange` to the quantization script:

```python3
"""
MinimumRealRange= float|None :
                    Default is None. If set to a floating-point value, the calculation of the quantization parameters
                    (i.e., scale and zero point) will enforce a minimum range between rmin and rmax. If (rmax - rmin)
                    is less than the specified minimum range, rmax will be set to rmin + QuantMinRealRange. This is
                    necessary for EPs like QNN that require a minimum floating-point range when determining
                    quantization parameters.
"""
```

### Motivation and Context
QNN requires a minimum floating-point range of 0.0001.

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Signed-off-by: adrianlizarraga <adlizarraga@microsoft.com>