### Godot version

v4.0.beta13.official [caacade56]

### System information

Linux Ubuntu 20.04 with Unity desktop

### Issue description

When calling an undefined function in the shader editor with argument(s), such as `undefined_function(1)`, the error reads:

> Too many arguments for "undefined_function()" call. Expected at most 0 but received 1.

instead of the expected:

> No matching function found for: 'undefined_function'.

This is possibly a regression introduced in https://github.com/godotengine/godot/issues/18225, since the latter was focused on the arguments part.

To avoid such regression in the future, consider adding a unit test with this case (and, in fact, unit tests for the other signature errors too if there are not already).

### Steps to reproduce

1. Create a shader resource and open the shader editor
2. Enter `undefined_function(1);` in the fragment() definition

### Minimal reproduction project

N/A
StringName varname;
										if (n->type == Node::NODE_TYPE_CONSTANT || n->type == Node::NODE_TYPE_OPERATOR || n->type == Node::NODE_TYPE_ARRAY_CONSTRUCT) {
											if (!is_const_arg) {
												error = true;
											}
										} else if (n->type == Node::NODE_TYPE_ARRAY) {
											ArrayNode *an = static_cast<ArrayNode *>(n);
											if (!is_const_arg && (an->call_expression != nullptr || an->is_const)) {
												error = true;
											}
											varname = an->name;
										} else if (n->type == Node::NODE_TYPE_VARIABLE) {
											VariableNode *vn = static_cast<VariableNode *>(n);
											if (vn->is_const && !is_const_arg) {
												error = true;
											}
											varname = vn->name;
										} else if (n->type == Node::NODE_TYPE_MEMBER) {
											MemberNode *mn = static_cast<MemberNode *>(n);
											if (mn->basetype_const && is_out_arg) {
												error = true;
											}
										}
										if (!error && varname != StringName()) {
											if (shader->constants.has(varname)) {
												error = true;
											} else if (shader->uniforms.has(varname)) {
												error = true;
											} else if (p_function_info.built_ins.has(varname)) {
												BuiltInInfo info = p_function_info.built_ins[varname];