tests: arch: arm: arm_irq_vector_table: Add remaining MEC boards

Any PR affecting all Microchip MEC SoC's causes twister to run
the arm IRQ vector table test. Since all the MEC boards are
using the MEC 32 KHz timer instead of ARM SysTick we added all
the remaining boards to the test. Each overlay disables the MEC
32 KHz timer and enables SysTick as the kernel timer.

Signed-off-by: Scott Worley <scott.worley@microchip.com>