FPGA: Add scripts to check linux boot linux on fpga

Created by: Gchauvon

Add 3 scripts to check linux boot on FPGA using Vivado.

• check_fpga_boot.sh: Top script, check that VIVADO_CMD is set and BITSTREAM exist before programming and checking linux boot.
• program_genesys2.tcl: Vivado tcl script to program fpga connected to an HW_SERVER
• linux_boot.py: python script that reads UART_SERIAL and check that linux boot successfully.

All those scripts are used by an incoming PR in core-v-verif that creates a job in Thales-CI and is integrated to Thales Dashboard @JeanRochCoulon @yanicasa Can you look at this ?