### 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 func_name;
						if (p_block && p_block->parent_function) {
							func_name = p_block->parent_function->name;
						}
						_parse_used_identifier(name, IdentifierType::IDENTIFIER_FUNCTION, func_name);
					}
#endif 
				}
			} else {
				
				last_name = identifier;
				last_type = IDENTIFIER_MAX;
				_set_tkpos(pos);
				DataType data_type = TYPE_MAX;
				IdentifierType ident_type = IDENTIFIER_MAX;
				int array_size = 0;
				StringName struct_name;
				bool is_local = false;
				if (p_block && p_block->block_tag != SubClassTag::TAG_GLOBAL) {
					int idx = 0;
					bool found = false;
					while (builtin_func_defs[idx].name) {
						if (builtin_func_defs[idx].tag == p_block->block_tag && builtin_func_defs[idx].name == identifier) {
							found = true;
							break;
						}
						idx++;
					}
					if (!found) {
						_set_error(vformat(RTR("Unknown identifier in expression: '%s'."), String(identifier)));