[xpu][test] Port 2 test/dtypes_{nf4, uintx} UT files to intel XPU

[zxd1997066]

For #2917, This PR is targeted to port test/dtypes/test_nf4.py and test/dtypes/test_uintx.py to intel XPU.

[pytorch-bot]

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[zxd1997066]

cc @liangan1

[pytorch-bot]

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[pytorch-bot]

To add the ciflow label ciflow/xpu please first approve the workflows that are awaiting approval (scroll to the bottom of this page).

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[pytorch-bot]

To add the ciflow label ciflow/xpu please first approve the workflows that are awaiting approval (scroll to the bottom of this page).

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