Fix asseration error ut

[jemitche1]

Fixes #ISSUE_NUMBER

This unit test assumes the outputs will be different because CUDA doesn't implicitly synchronize collectives.
On XPU, XCCL backend does implicitly synchronize during certain tensor ops so the mismatch doesn't happen.

As a sanity check , I tested the output :

[RANK 0] out_ref sum: {4096000000.0}
[RANK 1] out_ref sum: {4096000000.0}
[RANK 0] out_compiled sum: {4096000000.0}
[RANK 1] out_compiled sum: {4096000000.0}
[RANK 0] Equal? {True}

To fix, check for xpu available to skip assertion