[nvidia-bluefield] Add the possibility to compile BFB image (sonic-net#19512)

- Why I did it
Add the possibility to compile BFB (BlueField boot stream) image for the nvidia-bluefield platform.
The BFB image fully overwrites the DPU's SSD and can be used for DPU recovery.

- How I did it
Add new bfb image type to build_image.sh script. Add scripts under the "nvidia-bluefield" platform to create the binary file.

- How to verify it
Configure nvidia-bluefield platform. Run make target/sonic-nvidia-bluefield.bfb command to compile the image.

Author: oleksandrivantsiv

build_image.sh

@@ -253,6 +253,17 @@ elif [ "$IMAGE_TYPE" = "dsc" ]; then
 
     generate_onie_installer_image
 
+elif [ "$IMAGE_TYPE" = "bfb" ]; then
+    echo "Build BFB installer"
+
+    if [[ $SECURE_UPGRADE_MODE != "no_sign" ]]; then
+         secure_upgrade_keys="--signing-key "$SECURE_UPGRADE_DEV_SIGNING_KEY" --signing-cert "$SECURE_UPGRADE_SIGNING_CERT""
+    fi
+
+    sudo -E ./platform/${CONFIGURED_PLATFORM}/installer/create_sonic_image --kernel $KVERSION "$secure_upgrade_keys"
+
+    sudo chown $USER $OUTPUT_BFB_IMAGE
+
 else
     echo "Error: Non supported image type $IMAGE_TYPE"
     exit 1

onie-image-arm64.conf

@@ -53,3 +53,6 @@ ABOOT_BOOT_IMAGE=.sonic-boot.swi
 
 ## Output file name for dsc installer
 OUTPUT_DSC_IMAGE=target/sonic-$TARGET_MACHINE.tar
+
+## Output file name for bfb image
+OUTPUT_BFB_IMAGE=target/sonic-$TARGET_MACHINE.bfb