drivers: sensor: icm42605: fix default kconfig issues
drivers: sensor: icm42605: fix default kconfig issues

by default, a global trigger thread was enabled in kconfig but
the thread priority and stack size depended on a local thread
being enabled.

the local thread option was never used anywhere so it is removed.

Signed-off-by: Mikkel Jakobsen <31215e1a25e10d3f738438d78f8193ee267dd757@escolifesciences.com>

finikorg/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,finikorg/zephyr,galak/zephyr,galak/zephyr,finikorg/zephyr