[SPMD] Fix HybridMesh ordering (#5478)
Summary:
In xs.HybridMesh, it assumes the xr.global_runtime_device_attributes() will return the attributes according to the PyTorch/XLA's logical global ordinals. However, it turns out not to be the case.
To fix this, we pass the logical global ordinal as one of the attributes and xs.HybridMesh will sort the attributes according to this new attribute before using the array.
Test Plan:
PJRT_DEVICE=TPU USE_XLA_SPMD=1 python test/spmd/test_xla_sharding.py -v -k test_hybrid_mesh
