enable reshape+linear+reshape fusion for dynamic shapes (#121116)
reshape+linear+reshape fusion for dynamic shapes has been disabled in https://github.com/pytorch/pytorch/pull/107123.
Re-enable it by comparing the symbolic values in case of dynamic shapes. This will improve the performance for dynamic shape cases.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/121116
Approved by: https://github.com/jgong5, https://github.com/jansel
