LL change: the status of STATUS_DIE_AT_* is returned

As of Second Life Server 2022-09-09.574921, STATUS_DIE_AT_EDGE and STATUS_DIE_AT_NO_ENTRY return their corresponding settings rather than always FALSE.

Regression/coverage tests are clearly lacking in this area, as the change didn't trigger any test breakage, therefore add some unit tests.

unit_tests/regression.suite/computable.lsl

@@ -28,6 +28,7 @@ default
             , llGetDisplayName("")
             , llGetEnv("")
             , llGetEnv("yadda")
+            , llGetStatus(STATUS_CAST_SHADOWS)
             ]);
     }
 }