[BSRAM] Add Backup SRAM support for LYRA boards and relative test

CMakeLists.txt

libs/miosix-kernel

...ps/stm32f767zi_compute_unit_v2/config/board_options.cmake

...f767zi_compute_unit_v2/config/board_options_no_xram.cmake

src/bsps/stm32f767zi_compute_unit_v2/core/stage_1_boot.cpp

src/bsps/stm32f767zi_compute_unit_v2/interfaces-impl/bsp.cpp

...ps/stm32f767zi_compute_unit_v2/interfaces-impl/bsp_impl.h

src/bsps/stm32f767zi_compute_unit_v2/stm32_2m+32m_xram.ld

src/bsps/stm32f767zi_compute_unit_v2/stm32_2m+384k_ram.ld

...bsps/stm32f767zi_lyra_biscotto/config/board_options.cmake

src/bsps/stm32f767zi_lyra_biscotto/core/stage_1_boot.cpp

src/bsps/stm32f767zi_lyra_biscotto/interfaces-impl/bsp.cpp

...bsps/stm32f767zi_lyra_biscotto/interfaces-impl/bsp_impl.h

src/bsps/stm32f767zi_lyra_biscotto/stm32_2m+32m_xram.ld

src/bsps/stm32f767zi_lyra_biscotto/stm32_2m+384k_ram.ld

src/bsps/stm32f767zi_lyra_motor/config/board_options.cmake

src/bsps/stm32f767zi_lyra_motor/core/stage_1_boot.cpp

src/bsps/stm32f767zi_lyra_motor/interfaces-impl/bsp.cpp

src/bsps/stm32f767zi_lyra_motor/interfaces-impl/bsp_impl.h

src/bsps/stm32f767zi_lyra_motor/stm32_2m+32m_xram.ld