tests: drivers: i2c: i2c_target_api: add nucleo_f401re

Adds i2c3 on the dts of nucleo_f401re.
Adds necessary overlay and nucleo_f401re in i2c_target_api test case
to enable the board.

Signed-off-by: IBEN EL HADJ MESSAOUD Marwa <marwa.ibenelhadjmessaoud-ext@st.com>