### 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)

if (dir->current_is_dir()) {
					directories_to_check.append(current_dir.path_join(file_name) + "/");
				} else {
					bool proper_extension = false;
					if (file_name.ends_with(".gd") || file_name.ends_with(".shader") || file_name.ends_with(".gdshader") || file_name.ends_with(".tscn") || file_name.ends_with(".tres") || file_name.ends_with(".godot") || file_name.ends_with(".cs") || file_name.ends_with(".csproj") || file_name.ends_with(".import"))
						proper_extension = true;
					if (proper_extension) {
						collected_files.append(current_dir.path_join(file_name));
					}
				}
				file_name = dir->_get_next();
			}
		} else {
			print_verbose("Failed to open " + path);
		}
	}
	return collected_files;
}
Vector<SourceLine> ProjectConverter3To4::split_lines(const String &text) {
	Vector<String> lines = text.split("\n");
	Vector<SourceLine> source_lines;
	for (String &line : lines) {
		SourceLine source_line;
		source_line.line = line;
		source_line.is_comment = false;
		source_lines.append(source_line);
	}
	return source_lines;
}
bool ProjectConverter3To4::test_conversion_gdscript_builtin(String name, String expected, void (ProjectConverter3To4::*func)(Vector<SourceLine> &, const RegExContainer &, bool), String what, const RegExContainer &reg_container, bool builtin_script) {