[CANN] Fix registration of Identity operator (#16210)
### Description
<!-- Describe your changes. -->
This
[PR](https://github.com/microsoft/onnxruntime/commit/e726151b5cc1986e5b4b7fb178ecb538b6e81f67#diff-6957596681c25d78e7f3f56485f307fb7e66369309523240209a62c8fa21646b)
introduces a missing registration of Identity operator for version
greater than 14.
### 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. -->
It broke the CANN CI. I added the registration of identity operator.
