fix: fixed the logical_not not support the bfloat16

[samthakur587]

fixed the logical_not not support the bfloat16 at paddle backend

fix support for bfloat16 at paddle backend that the paddle doesn't support the bfloat16 dtype and removed the `python if paddle.is_complex(x):

    return paddle.logical_and(
        paddle.logical_not(x.real()), paddle.logical_not(x.imag())
    ) # the paddle itself support the complex dtype for paddle.logical_not `

passing all tests at local.

Closes #28454

Checklist

• Did you add a function?
• Did you add the tests?
• Did you run your tests and are your tests passing?
• Did pre-commit not fail on any check?
• Did you follow the steps we provided?

[Ishticode]

Hi Sam. Thanks for the PR.

[Ishticode]

we seem to be removing the complex dtype handling. So is complex unsupported now or does it still work?
if it is unsupported then it should be marked in the unsupported dtype decorator above

[samthakur587]

yes it's working bcz the paddle.logical_not can handle the complex dtype also. here the paddle doc for this and i have tested this passing all tests in local.

[Ishticode]

Thanks @samthakur587
Will merge soon