Add shared memory transport layer for the stm32wb55

to use connection and services the BLE RF through IPM SharedMem

The Rx data are stored in a fifo to manage connection, and ACL packets
with context section to protect index when receiving data.
The BLE init set the device address and power settings just after the HCI_RESET command sent
The LSE clock is used for the RF and WakeUp capability by the variant.
There is no BLEChip enum as only one chip at this time.
Debug is activated with CONFIG_DEBUG enabled

Signed-off-by: Francois Ramu <francois.ramu@st.com>