### Godot version

v4.0.beta15.official [4fa6edc88]

### System information

Windows 10 (10.0.19045 Build 19045) | Forward+ | Vulkan API 1.3.206 | AMD Radeon RX 6800 XT

### Issue description

If there is a function with arguments within a `.gdshaderinc` file, then this function can not be used in other shaders that include this via a relative include. The error in the other shaders is "Too many arguments for "example()" call. Expected at most 0 but received 1". Using an absolute path for the include resolves the error.

**Note:** The relative include *does* work in the special case of both files being in the project root.

### Steps to reproduce

1. Put a shader and a shader-include file into a subdirectory
2. Write a function with arguments in the shader-include file
3. Include that file in the shader
4. Try to use the function

### Minimal reproduction project

[shader-include-bug.zip](https://github.com/godotengine/godot/files/10508745/shader-include-bug.zip)

virtual Mode get_mode() const;
	virtual void set_path(const String &p_path, bool p_take_over = false) override;
	void set_code(const String &p_code);
	String get_code() const;
	void get_shader_uniform_list(List<PropertyInfo> *p_params, bool p_get_groups = false) const;
	void set_default_texture_parameter(const StringName &p_name, const Ref<Texture2D> &p_texture, int p_index = 0);
	Ref<Texture2D> get_default_texture_parameter(const StringName &p_name, int p_index = 0) const;
	void get_default_texture_parameter_list(List<StringName> *r_textures) const;
	virtual bool is_text_shader() const;
	virtual RID get_rid() const override;
	Shader();
	~Shader();
};
VARIANT_ENUM_CAST(Shader::Mode);
class ResourceFormatLoaderShader : public ResourceFormatLoader {
public:
	virtual Ref<Resource> load(const String &p_path, const String &p_original_path = "", Error *r_error = nullptr, bool p_use_sub_threads = false, float *r_progress = nullptr, CacheMode p_cache_mode = CACHE_MODE_REUSE);
	virtual void get_recognized_extensions(List<String> *p_extensions) const;
	virtual bool handles_type(const String &p_type) const;
	virtual String get_resource_type(const String &p_path) const;
};
class ResourceFormatSaverShader : public ResourceFormatSaver {
public:
	virtual Error save(const Ref<Resource> &p_resource, const String &p_path, uint32_t p_flags = 0);
	virtual void get_recognized_extensions(const Ref<Resource> &p_resource, List<String> *p_extensions) const;
	virtual bool recognize(const Ref<Resource> &p_resource) const;
};
#endif