Update SkipLayerNorm fusion rules (#13350)
### Description
<!-- Describe your changes. -->
The subgraph below meet the SkipLayerNorm fusion pattern, but the fusion
rules also required every input dimension has a certain value. So the
subgraph below cannot fused to SkipLayerNorm.
subgraph we want to fuse
fusion pattern 3
[Sub1] [Sub2]
\ /
\ /
\ /
Add1
|
LayerNormalization
This change allow inputs of FirstAdd operator has dimension which only
has dim_param.
### Motivation and Context
<!-- - Why is this change required? What problem does it solve?
- If it fixes an open issue, please link to the issue here. -->
Co-authored-by: peixuanzuo <peixuanzuo@linmif39a000004.zvflicr54joexhdgnhvmxrxygg.phxx.internal.cloudapp.net>
