Activate FP8 cases in test_ops

[CuiYifeng]

Since more FP8 Ops will be supported on XPU recently, basic FP8 cases should be activated. This PR will remove the following cases from skip list:

TestCommonXPU::test_compare_cpu_torch__scaled_mm_xpu_float8_e4m3fn SKIPPED (test doesn't work on XPU backend)
TestCommonXPU::test_out_torch__scaled_mm_xpu_float8_e4m3fn SKIPPED (Skipped!)
TestCommonXPU::test_python_ref__refs_eye_xpu_float8_e4m3fn SKIPPED (test doesn't work on XPU backend)
TestCommonXPU::test_python_ref__refs_eye_xpu_float8_e4m3fnuz SKIPPED (test doesn't work on XPU backend)
TestCommonXPU::test_python_ref__refs_eye_xpu_float8_e5m2 SKIPPED (test doesn't work on XPU backend)
TestCommonXPU::test_python_ref__refs_eye_xpu_float8_e5m2fnuz SKIPPED (test doesn't work on XPU backend)
TestCommonXPU::test_python_ref_executor__refs_eye_executor_aten_xpu_float8_e4m3fn PASSED
TestCommonXPU::test_python_ref_executor__refs_eye_executor_aten_xpu_float8_e4m3fnuz PASSED
TestCommonXPU::test_python_ref_executor__refs_eye_executor_aten_xpu_float8_e5m2 PASSED
TestCommonXPU::test_python_ref_executor__refs_eye_executor_aten_xpu_float8_e5m2fnuz PASSED
TestCommonXPU::test_python_ref_meta__refs_eye_xpu_float8_e4m3fn SKIPPED (test doesn't work on XPU backend)
TestCommonXPU::test_python_ref_meta__refs_eye_xpu_float8_e4m3fnuz SKIPPED (test doesn't work on XPU backend)
TestCommonXPU::test_python_ref_meta__refs_eye_xpu_float8_e5m2 SKIPPED (test doesn't work on XPU backend)
TestCommonXPU::test_python_ref_meta__refs_eye_xpu_float8_e5m2fnuz SKIPPED (test doesn't work on XPU backend)
TestCommonXPU::test_python_ref_torch_fallback__refs_eye_xpu_float8_e4m3fn SKIPPED (test doesn't work on XPU backend)
TestCommonXPU::test_python_ref_torch_fallback__refs_eye_xpu_float8_e4m3fnuz SKIPPED (test doesn't work on XPU backend)
TestCommonXPU::test_python_ref_torch_fallback__refs_eye_xpu_float8_e5m2 SKIPPED (test doesn't work on XPU backend)
TestCommonXPU::test_python_ref_torch_fallback__refs_eye_xpu_float8_e5m2fnuz SKIPPED (test doesn't work on XPU backend)

[Copilot]

Pull Request Overview

This PR activates FP8 (8-bit floating point) test cases for XPU backend by removing the global FP8 skip pattern from the test skip list. With FP8 support now available on XPU, the tests that were previously skipped due to lack of FP8 implementation can now be enabled.

Key changes:

• Removes the "float8" skip pattern that was blocking all FP8-related tests
• Removes associated comments explaining why FP8 was not supported
• Enables previously skipped FP8 test cases including _scaled_mm and _refs_eye operations

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[CuiYifeng]

@daisyden Please activate these cases that do not work on XPU backend in stock Pytorch.

[dvrogozh]

Since FP8 will be supported on XPU recently

@CuiYifeng : FP8 is already supported for the scope of activated tests. Or it will be supported soon? If the first, then we should expect FP8 tests to execute without failures. If the latter we should see test failures. I guess the first is true as I don't see FP8 specific test failures in the summary.

[CuiYifeng]

Since FP8 will be supported on XPU recently

@CuiYifeng : FP8 is already supported for the scope of activated tests. Or it will be supported soon? If the first, then we should expect FP8 tests to execute without failures. If the latter we should see test failures. I guess the first is true as I don't see FP8 specific test failures in the summary.

@dvrogozh Thanks for the reminder. The first interpretation is closer to the facts. I have updated "FP8 will be supported" to "more FP8 Ops will be supported".