add no split modules for xlmrobertaxl
Author: ManuelFay
Pull request: yes

# What does this PR do?

Enables loading XLMRobertaWL with the device map for multiGPU training.

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Fixes # (issue)


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Comments:
Follows the same no_split_modules than the XLMRoberta model

It skips both tests but no fails at least.

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