`__array_namespace_info__` returns `complex128` dtype when no fp64

[antonwolfy]

It seems dpctl only checks if float64 is supported based on device capabilities when building a dictionary of all Array API data types:

import dpctl, dpctl.tensor as dpt

dpctl.__version__
# Out: '0.19.0dev0+480.g360ce45dc6'

info = dpnp.__array_namespace_info__()
info.dtypes()
# Out:
# {'bool': dtype('bool'),
#  'float32': dtype('float32'),
#  'complex64': dtype('complex64'),
#  'complex128': dtype('complex128'),
#  'int8': dtype('int8'),
#  'int16': dtype('int16'),
#  'int32': dtype('int32'),
#  'int64': dtype('int64'),
#  'uint8': dtype('uint8'),
#  'uint16': dtype('uint16'),
#  'uint32': dtype('uint32'),
#  'uint64': dtype('uint64')}

# no fp64 support by default device:
dpctl.select_default_device().has_aspect_fp64
# Out: False

As a result float64 is filtered out but complex128 is present in the output dictionary, which looks faulty.