### 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
Node *expr = _parse_and_reduce_expression(nullptr, constants);
						if (!expr) {
							return ERR_PARSE_ERROR;
						}
						if (expr->type != Node::NODE_TYPE_CONSTANT) {
							_set_error(RTR("Expected constant expression after '='."));
							return ERR_PARSE_ERROR;
						}
						ConstantNode *cn = static_cast<ConstantNode *>(expr);
						uniform.default_value.resize(cn->values.size());
						if (!convert_constant(cn, uniform.type, uniform.default_value.ptrw())) {
							_set_error(vformat(RTR("Can't convert constant to '%s'."), get_datatype_name(uniform.type)));
							return ERR_PARSE_ERROR;
						}
						tk = _get_token();
					}
					shader->uniforms[name] = uniform;
#ifdef DEBUG_ENABLED
					if (check_warnings && HAS_WARNING(ShaderWarning::UNUSED_UNIFORM_FLAG)) {
						used_uniforms.insert(name, Usage(tk_line));
					}
#endif 
					
					uniform_scope = ShaderNode::Uniform::SCOPE_LOCAL;
					if (tk.type != TK_SEMICOLON) {
						_set_expected_error(";");
						return ERR_PARSE_ERROR;
					}
#ifdef DEBUG_ENABLED
					keyword_completion_context = CF_GLOBAL_SPACE;