Add _native_batch_norm_legit_no_training to core IR (#107732)
Summary: Added due to how common the op is. For performance reasons users may not want to decompose batch_norm op. batch_norm is also part of StableHLO
Test Plan: After adding to IR, we can enable _check_ir_validity in exir.EdgeCompileConfig for models like MV2, MV3, IC3, IC4
Reviewed By: guangy10
Differential Revision: D48576866
Pull Request resolved: https://github.com/pytorch/pytorch/pull/107732
Approved by: https://github.com/manuelcandales, https://github.com/guangy10
