### 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
return nullptr;
						}
					} else if (tk.type == TK_PERIOD) {
						completion_class = TAG_ARRAY;
						if (p_block != nullptr) {
							p_block->block_tag = SubClassTag::TAG_ARRAY;
						}
						call_expression = _parse_and_reduce_expression(p_block, p_function_info);
						if (p_block != nullptr) {
							p_block->block_tag = SubClassTag::TAG_GLOBAL;
						}
						if (!call_expression) {
							return nullptr;
						}
					} else if (tk.type == TK_BRACKET_OPEN) { 
						index_expression = _parse_and_reduce_expression(p_block, p_function_info);
						if (!index_expression) {
							return nullptr;
						}
						if (index_expression->get_array_size() != 0 || (index_expression->get_datatype() != TYPE_INT && index_expression->get_datatype() != TYPE_UINT)) {
							_set_error(RTR("Only integer expressions are allowed for indexing."));
							return nullptr;
						}
						if (index_expression->type == Node::NODE_TYPE_CONSTANT) {
							ConstantNode *cnode = static_cast<ConstantNode *>(index_expression);
							if (cnode) {
								if (!cnode->values.is_empty()) {
									int value = cnode->values[0].sint;
									if (value < 0 || value >= array_size) {
										_set_error(vformat(RTR("Index [%d] out of range [%d..%d]."), value, 0, array_size - 1));