### Godot version

4.0 stable

### System information

Manjaro Linux, kernel 6.1.1-1-MANJARO, AMD Ryzen 5 3600, AMD RX 580

### Issue description

The `wrap_mode` property of the `TextEdit` node doesn't seem to really do anything. Setting it to `LINE_WRAPPING_BOUNDARY` simply means that there won't be an horizontal scrollbar if the text overshoots the boundary, instead of actually forcing the text to the next line so that it stays visible.

### Steps to reproduce

Create a TextEdit node and set its `wrap_mode` property to `LINE_WRAPPING_BOUNDARY`

### Minimal reproduction project

[WrapBugDemo.zip](https://github.com/godotengine/godot/files/10875969/WrapBugDemo.zip)

int next_end_pos = _get_affected_lines_to(c_next);
			int current_start_pos = text_editor->has_selection(c_current) ? text_editor->get_selection_from_line(c_current) : text_editor->get_caret_line(c_current);
			i = j;
			if (next_end_pos != current_start_pos && next_end_pos + 1 != current_start_pos) {
				break;
			}
			group_border.first = next_start_pos;
			new_group.push_back(c_next);
			
			if (j + 1 == caret_edit_order.size() - 1) {
				i++;
			}
		}
		group_borders.push_back(group_border);
		caret_groups.push_back(new_group);
	}
	for (int i = group_borders.size() - 1; i >= 0; i--) {
		if (group_borders[i].first - 1 < 0) {
			continue;
		}
		
		if (i < group_borders.size() - 1 && group_borders[i].first - 1 <= group_borders[i + 1].second) {
			continue;
		}
		
		Vector<Vector<int>> caret_group_parameters;
		for (int j = 0; j < caret_groups[i].size(); j++) {
			int c = caret_groups[i][j];
			int cursor_line = text_editor->get_caret_line(c);
			int cursor_column = text_editor->get_caret_column(c);