tests: arch: arm: add test for IRQ Target state management

We add a simple test-case for verifying the behavior of the
Cortex-M IRQ target state management. We add an additional
test only for TrustZone-enabled Cortex-M targets running
in Secure mode. We explicitly exclude ARMv8-M platforms that
enable Non-Secure FW build by default from running the test.

Signed-off-by: Ioannis Glaropoulos <Ioannis.Glaropoulos@nordicsemi.no>