[BE][DTensor] validate the mesh argument in DeviceMesh construction (#99094)
## What's in this PR
DeviceMesh's __init__ function now requires all calling ranks to pass the same `mesh` argument.
## Why
We want to enforce SPMD style of programs using DTensor. Before this PR, 2-D Parallel API (e.g. _create_1d_device_mesh) defines different DeviceMesh on different ranks. After this PR, it defines each sub-meshes and simply perform communications on the one that it is associated with.
Differential Revision: [D45165511](https://our.internmc.facebook.com/intern/diff/D45165511)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/99094
Approved by: https://github.com/wanchaol
