[MLIR] Remove non-word characters from MLIR module names.
[MLIR] Remove non-word characters from MLIR module names.

This ensures that the XLA module name matches the MHLO module name. Some users expect the input and output module names to match.

PiperOrigin-RevId: 416845848

google/jax,google/jax,google/jax,google/jax