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/Libraries/LibJS/Runtime/Value.cpp

@@ -156,7 +156,7 @@ static String double_to_string(double d)
         return builder.to_string();
     }
     if (-6 < exponent && exponent <= 0) {
-        builder.append("0.");
+        builder.append("0."sv);
         builder.append(String::repeated('0', -exponent));
         builder.append(digits);
         return builder.to_string();