tests: posix: temporarily exclude two platforms failing in CI

Two platforms are failing posix tests. One is a known issue with a fix in
review (mps2/an385 userspace), and the other is an issue with
qemu_arc/qemu_arc_hs5x encountering an invalid instruction and crashing.

Signed-off-by: Chris Friedt <[email protected]>

Author: cfriedt

tests/posix/common/testcase.yaml

@@ -70,6 +70,9 @@ tests:
       - CONFIG_THREAD_STACK_INFO=n
   portability.posix.common.userspace:
     filter: CONFIG_ARCH_HAS_USERSPACE
+    # Excluded while #96602 is in review
+    platform_exclude:
+      - mps2/an385
     tags:
       - userspace
     extra_configs:

tests/posix/signals/testcase.yaml

@@ -9,6 +9,12 @@ common:
     - simulation
   min_flash: 64
   min_ram: 32
+  # Exclude qemu_arc/qemu_arc_hs5x for now because of qemu_arc issue
+  # qemu-system-arc: /usr/src/debug/nativesdk-qemu-arc/git/target/arc/decoder-v2.c:266:
+  #   arc_find_format_v2: Assertion `mcount != 0' failed.
+  # Aborted (core dumped)
+  platform_exclude:
+    - qemu_arc/qemu_arc_hs5x
 tests:
   portability.posix.signals:
     integration_platforms: