modules: Add gigadevice hal module

This add access to modules/hal/gigadevice with three firmware
libraries by updating west.yaml file:

 - GD32E10X ARM (Cortex-M4F)
 - GD32F403 ARM (Cortex-M4F)
 - GD32VF103 RISC-V (Nucleisys Bumblebee core)

It introduce module/hal_gigadevice, which contains all Cmake
and Kconfig rules to build GigaDevice SoCs into zephyr main
tree.

Signed-off-by: Gerson Fernando Budke <gerson.budke@atl-electronics.com>