[FER] Add touch controller to the /chosen node

[rexut]

Is your enhancement proposal related to a problem? Please describe.
Where ever it is possible, support the new feature of chosen touch controller to be selectable by Zephyr applications. See:

• zephyrproject-rtos/zephyr@b38a4cc
• zephyrproject-rtos/zephyr@8941a21

Describe the solution you'd like
Add the new property zephyr,touch to the /chosen node for boards and/or shields that provide a touch screen controller. Also reuse the Zephyr upstream sample draw_touch_events (Draw touch events) for evaluation and regression tests in GitHub workflows. See:

• https://docs.zephyrproject.org/latest/samples/subsys/input/draw_touch_events/README.html
• https://docs.zephyrproject.org/latest/services/input/index.html#input-event-definitions

Describe alternatives you've considered
None.

Additional context
None.