[AMDGPU][Offload][LIT] Run unified_shared_memory tests on gfx950 (#150372)

Enables 9 more tests

Author: hidekisaito

offload/test/lit.cfg

@@ -133,7 +133,8 @@ elif config.libomptarget_current_target.startswith('amdgcn'):
     # amdgpu_test_arch contains a list of AMD GPUs in the system
     # only check the first one assuming that we will run the test on it.
     if not (config.amdgpu_test_arch.startswith("gfx90a") or
-            config.amdgpu_test_arch.startswith("gfx942")):
+            config.amdgpu_test_arch.startswith("gfx942") or
+            config.amdgpu_test_arch.startswith("gfx950")):
        supports_unified_shared_memory = False
     # check if AMD architecture is an APU:
     if ((config.amdgpu_test_arch.startswith("gfx942") and