Rather than passing a power value of 1 to the scale op, send None.

[SandSnip3r]

Description

Rather than passing 1 for the exponent for the scale op, pass None. This will save a wasteful elementwise pow op being run.
This also prevents us from hitting a bug in TensorRT-RTX where pow(x,y) where x is negative returns NaN.

Fixes #3699

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• My code follows the style guidelines of this project (You can use the linters)
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