Pandas BUG: to_timedelta(pd.NA) raising ValueError

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Reproducible Example

import pandas as pd

pd.to_datetime(pd.NA)   # -> NaT
pd.to_timedelta(pd.NA)  # -> ValueError: Value must be Timedelta, string, integer, float, timedelta or convertible, not NAType

Issue Description

to_timedelta(pd.NA) raising ValueError.

Expected Behavior

to_timedelta(pd.NA) should return NaT similar to to_datetime(pd.NA).

Installed Versions

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Comment From: DeaMariaLeon

take