[JAX] Extend colocated_cpu_devices to accept Mesh besides devices
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colocated_cpu_mesh and colocated_cpu_sharding APIs for colocated Pythoncolocated_cpu_devices to accept Mesh besides devices
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This change extends existing `colocated_cpu_devices` to take a JAX `Mesh` and returns a new `Mesh` that uses colocated CPU devices. This conversion is a common operation when using colocated Python because the user copies arrays between two meshes while preserving other sharding properties of the array. PiperOrigin-RevId: 770223744
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[JAX] Extend
colocated_cpu_devicesto acceptMeshbesides devicesThis change extends existing
colocated_cpu_devicesto take a JAXMeshandreturns a new
Meshthat uses colocated CPU devices. This conversion is acommon operation when using colocated Python because the user copies arrays
between two meshes while preserving other sharding properties of the array.