[ONNX FE] [PTL] Regression for Topaz ONNX model (#33733)
Fixes `LayerNormalization` regression, where the optional `bias` input
was not being handled as fully optional.
The bug report exposed runtime failure in cases, where
`LayerNormalization` was fed without the `bias` input, which was causing
indexing out of bounds errors. `LayerNormalization` tried to handle
`bias` which was not present.
### Tickets:
- CVS-179401
