CMake: Enable running unit tests with a Debug build/preset

Author: https://github.com/sideshowbarker
Commit: edf0d9b7bb
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/1210

CMakePresets.json

@@ -131,6 +131,11 @@
         "ASAN_OPTIONS": "strict_string_checks=1:check_initialization_order=1:strict_init_order=1:detect_stack_use_after_return=1:allocator_may_return_null=1",
         "UBSAN_OPTIONS": "print_stacktrace=1:print_summary=1:halt_on_error=1"
       }
+    },
+    {
+      "name": "Debug",
+      "inherits": "default",
+      "configurePreset": "Debug"
     }
   ]
 }