tests/cmsis_rtos_v2: exclude m2gl025_miv due to tick rate conflict

Commit ee4c23cc ("CMSIS v2: Work around time unit confusion")
enforced CONFIG_SYS_CLOCK_TICKS_PER_SEC=1000 on this test, but the
m2gl025_miv platform has some issues with it. Let's exclude it for now.

Signed-off-by: Nicolas Pitre <npitre@baylibre.com>