mgmt: updatehub: Fix json arrays

[nandojve]

After the changes introduced by #50816 the UpdateHub could not decode anymore the JSON object. This introduce missing parsing definitions to allow JSON parser undertood the correct UpdateHub probe object.

Fixes #69297

Before evaluate it is recommended take a look at UpdateHub zephyr guide and make sure your device have a network connection. Remember that by default UpdateHub sample get IP automatically.

Steps to Evaluate:

Run updatehub-ce docker

sudo docker run -it -p 8080:8080 -p 5683:5683/udp --rm updatehub/updatehub-ce:latest

Build SoC bootloader and flash

west build -b frdm_k64f -d build/mcuboot-frdm_k64f bootloader/mcuboot/boot/zephyr
west flash -d build/mcuboot-frdm_k64f

Build UpdateHub sample, sign and flash

west build -b frdm_k64f -d build/app zephyr/samples/subsys/mgmt/updatehub -- -DOVERLAY_CONFIG=overlay-prj.conf
west sign -t imgtool -d build/app -- --version 1.0.0 --pad --key bootloader/mcuboot/root-rsa-2048.pem
west flash -d build/app --hex-file build/app/zephyr/zephyr.signed.hex

Sign and package using uhu

west sign --no-hex --bin -B build/zephyr-2.0.0.bin -t imgtool -d build/app -- --version 2.0.0 --key bootloader/mcuboot/root-rsa-2048.pem
uhu package archive --output build/zephyr-2.0.0.pkg

On the UpdateHub-CE UI go to packages and upload the zephyr-2.0.0.pkg
On the UpdateHub-CE UI go to rollouts and create the rollout

CC: @otavio

Note

The below error is on investigation and seems to be unrelated to UpdateHub since it is an internal API provided by dfu subsystem.

I: Firmware download complete
E: Could not mark partition to upgrade