ESP32-C2 has a single group timer, thus it will use it for the interrupt watchdog,
which is more critical than the task watchdog. The latter is implement in
software thanks to the `esp_timer`component.
This commit:
- adds the migration guide for migrating from the now deprecated cpu_hal/ll.h,
soc_hal/ll.h, and interrupt_controller_hal.h to esp_cpu.h.
- adds the migration guide for migrating from the now deleted compare_set.h header file.
- adds the migration guide for migrating from the now deleted esp_cpu_get_ccount(),
esp_cpu_set_ccount() and esp_cpu_in_ocd_debug_mode() functions in esp_cpu.h.
