### 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)

class ProjectConverter3To4 {
	class RegExContainer;
	uint64_t maximum_file_size;
	uint64_t maximum_line_length;
	void fix_tool_declaration(Vector<SourceLine> &source_lines, const RegExContainer &reg_container);
	void rename_colors(Vector<SourceLine> &source_lines, const RegExContainer &reg_container);
	Vector<String> check_for_rename_colors(Vector<String> &lines, const RegExContainer &reg_container);
	void rename_classes(Vector<SourceLine> &source_lines, const RegExContainer &reg_container);
	Vector<String> check_for_rename_classes(Vector<String> &lines, const RegExContainer &reg_container);
	void rename_gdscript_functions(Vector<SourceLine> &source_lines, const RegExContainer &reg_container, bool builtin);
	Vector<String> check_for_rename_gdscript_functions(Vector<String> &lines, const RegExContainer &reg_container, bool builtin);
	void process_gdscript_line(String &line, const RegExContainer &reg_container, bool builtin);
	void rename_csharp_functions(Vector<SourceLine> &source_lines, const RegExContainer &reg_container);
	Vector<String> check_for_rename_csharp_functions(Vector<String> &lines, const RegExContainer &reg_container);
	void process_csharp_line(String &line, const RegExContainer &reg_container);
	void rename_csharp_attributes(Vector<SourceLine> &source_lines, const RegExContainer &reg_container);
	Vector<String> check_for_rename_csharp_attributes(Vector<String> &lines, const RegExContainer &reg_container);
	void rename_gdscript_keywords(Vector<SourceLine> &r_source_lines, const RegExContainer &p_reg_container, bool p_builtin);
	Vector<String> check_for_rename_gdscript_keywords(Vector<String> &r_lines, const RegExContainer &p_reg_container, bool p_builtin);
	void rename_input_map_scancode(Vector<SourceLine> &source_lines, const RegExContainer &reg_container);
	Vector<String> check_for_rename_input_map_scancode(Vector<String> &lines, const RegExContainer &reg_container);