Kernel: Make Processor::capture_stack_trace fallible using ErrorOr

Author: https://github.com/IdanHo
Commit: 0142f33ddc
Pull-request: https://github.com/SerenityOS/serenity/pull/11932
Reviewed-by: https://github.com/alimpfard
Reviewed-by: https://github.com/creator1creeper1

Kernel/Arch/x86/Processor.h

@@ -398,7 +398,7 @@ public:
     NEVER_INLINE void switch_context(Thread*& from_thread, Thread*& to_thread);
     [[noreturn]] static void assume_context(Thread& thread, FlatPtr flags);
     FlatPtr init_context(Thread& thread, bool leave_crit);
-    static Vector<FlatPtr, 32> capture_stack_trace(Thread& thread, size_t max_frames = 0);
+    static ErrorOr<Vector<FlatPtr, 32>> capture_stack_trace(Thread& thread, size_t max_frames = 0);
 
     static StringView platform_string();
 };