### Godot version

v4.0.3.rc2.official [2ac4e3bb3]

### System information

Windows 10

### Issue description

It seems that joypad button numbers are changed in Godot 4. The Godot 3->4 conversion doesn't change the button numbers.

This Godot 3 Input Map:

![kuva](https://github.com/godotengine/godot/assets/49998025/86a7db2a-b5b5-48a3-84f9-999de1ed584a)

is converted to this:

![kuva](https://github.com/godotengine/godot/assets/49998025/30ef5803-0559-4408-b0ac-e878bf167ff7)

It seems that only buttons 0-3 are same in Godot 3 and 4:

![kuva](https://github.com/godotengine/godot/assets/49998025/37818929-9582-4a11-bdbe-617fd51dd501)


### Steps to reproduce

Convert any Godot 3 project having joypad buttons assigned to inputs.

### Minimal reproduction project

[conv_test.zip](https://github.com/godotengine/godot/files/11525027/conv_test.zip)

Vector<String> found_renames;
	// 
	const int old_spkey = (1 << 24);
	int current_line = 1;
	for (String &line : lines) {
		if (uint64_t(line.length()) <= maximum_line_length) {
			TypedArray<RegExMatch> reg_match = reg_container.input_map_keycode.search_all(line);
			for (int i = 0; i < reg_match.size(); ++i) {
				Ref<RegExMatch> match = reg_match[i];
				PackedStringArray strings = match->get_strings();
				int key = strings[3].to_int();
				if (key & old_spkey) {
					// 
					key = (key & ~old_spkey) | (int)Key::SPECIAL;
					found_renames.append(line_formatter(current_line, strings[3], String::num_int64(key), line));
				}
			}
		}
		current_line++;
	}
	return found_renames;
}
void ProjectConverter3To4::custom_rename(Vector<SourceLine> &source_lines, String from, String to) {