Do not skip FFT tests

Author: Wetitpig

test/xpu/skip_list_common.py

@@ -635,25 +635,6 @@
         "test_python_ref_torch_fallback__refs_div_trunc_rounding_xpu_float64",
         # TODO: passed from source code building version, investigate
         "test_python_ref__refs_log2_xpu_complex128",
-        # The following dtypes did not work in backward but are listed by the OpInfo: {torch.bfloat16}.
-        "test_dtypes_fft_fft2_xpu",
-        "test_dtypes_fft_fft_xpu",
-        "test_dtypes_fft_fftn_xpu",
-        "test_dtypes_fft_hfft2_xpu",
-        "test_dtypes_fft_hfft_xpu",
-        "test_dtypes_fft_hfftn_xpu",
-        "test_dtypes_fft_ifft2_xpu",
-        "test_dtypes_fft_ifft_xpu",
-        "test_dtypes_fft_ifftn_xpu",
-        "test_dtypes_fft_ihfft2_xpu",
-        "test_dtypes_fft_ihfft_xpu",
-        "test_dtypes_fft_ihfftn_xpu",
-        "test_dtypes_fft_irfft2_xpu",
-        "test_dtypes_fft_irfft_xpu",
-        "test_dtypes_fft_irfftn_xpu",
-        "test_dtypes_fft_rfft2_xpu",
-        "test_dtypes_fft_rfft_xpu",
-        "test_dtypes_fft_rfftn_xpu",
     ),
     "test_binary_ufuncs_xpu.py": (
         "test_fmod_remainder_by_zero_integral_xpu_int64",  # zero division is an undefined behavior: different handles on different backends