### 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
/*} else if (tk.type==TK_BRACKET_OPEN) {
				
				//subindexing has priority over any operator
				
	*/
			} else if (tk.type == TK_BRACKET_OPEN) {
				Node *index = _parse_and_reduce_expression(p_block, p_function_info);
				if (!index) {
					return nullptr;
				}
				if (index->get_array_size() != 0 || (index->get_datatype() != TYPE_INT && index->get_datatype() != TYPE_UINT)) {
					_set_error(RTR("Only integer expressions are allowed for indexing."));
					return nullptr;
				}
				DataType member_type = TYPE_VOID;
				String member_struct_name;
				if (expr->get_array_size() > 0) {
					if (index->type == Node::NODE_TYPE_CONSTANT) {
						uint32_t index_constant = static_cast<ConstantNode *>(index)->values[0].uint;
						if (index_constant >= (uint32_t)expr->get_array_size()) {
							_set_error(vformat(RTR("Index [%d] out of range [%d..%d]."), index_constant, 0, expr->get_array_size() - 1));
							return nullptr;
						}
					}
					member_type = expr->get_datatype();
					if (member_type == TYPE_STRUCT) {
						member_struct_name = expr->get_datatype_name();