drivers/sensor: lis2dux12: add high performance mode

Add driver capability to properly set high performance mode
while setting data rate (thru lis2duxxx_mode_set() API)
based on how power-mode is set into DTS: if it is set to
LIS2DUX12_OPER_MODE_HIGH_PERFORMANCE then configure HP mode,
LP/ULP mode otherwise.

Signed-off-by: Armando Visconti <armando.visconti@st.com>