### 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)

if (!p_continue) {
		state->condition_depth++;
		state->current_branch = &state->branches.push_back(Branch(p_success, state->current_branch))->get();
	} else {
		state->current_branch->conditions.push_back(p_success);
	}
	if (!p_success) {
		Vector<String> ends;
		ends.push_back("elif");
		ends.push_back("else");
		ends.push_back("endif");
		next_directive(p_tokenizer, ends);
	}
}
void ShaderPreprocessor::expand_output_macros(int p_start, int p_line_number) {
	String line = vector_to_string(output, p_start, output.size());
	Error error = expand_macros(line, p_line_number - 1, line); 
	if (error != OK) {
		return;
	}
	output.resize(p_start);
	add_to_output(line);
}
Error ShaderPreprocessor::expand_condition(const String &p_string, int p_line, String &r_expanded) {