BUG: pd.array([], dtype=None) should return a masked array

[topper-123]

Current situation:

>>> import pandas as pd
>>> pd.array([])
<NumpyExtensionArray>
[]
Length: 0, dtype: float64

i.e. returns a numpy dtype. This is IMO inconsistent, as pd.array generally tries to return masked dtypes from lists when possible. IMO the above should instead give:

>>> import pandas as pd
>>> pd.array([])
<FloatingArray>
[]
Length: 0, dtype: Float64