Revert "tests: kernel: interrupt: Disable on ARM64 QEMU targets"

This reverts the commit 7d8a119
because GCC is now configured to not emit ldp/stp Qn instructions for
consecutive 32-byte loads and stores, and the nested interrupt handling
failure due to the missing emulation of these instructions no longer
occurs.

For more details, refer to the GitHub issue #49491 and #49806.

Signed-off-by: Stephanos Ioannidis <[email protected]>

Author: stephanosio

tests/kernel/interrupt/testcase.yaml

@@ -2,8 +2,6 @@ tests:
   arch.interrupt:
     # nios2 excluded, see #22956
     arch_exclude: nios2
-    # FIXME: qemu_cortex_a53 is excluded, see #49491
-    platform_exclude: qemu_cortex_a53 qemu_cortex_a53_smp
     tags: kernel interrupt
     filter: not CONFIG_TRUSTED_EXECUTION_NONSECURE