Everywhere: Add sv suffix to strings relying on StringView(char const*)

Each of these strings would previously rely on StringView's char const*
constructor overload, which would call __builtin_strlen on the string.
Since we now have operator ""sv, we can replace these with much simpler
versions. This opens the door to being able to remove
StringView(char const*).

No functional changes.

Userland/Services/WindowServer/ScreenLayout.h

@@ -37,7 +37,7 @@ public:
         {
 #define __ENUMERATE_MODE_ENUM(val) \
     case Mode::val:                \
-        return #val;
+        return #val##sv;
 
             switch (mode) {
                 __ENUMERATE_MODE_ENUM(Invalid)