### 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)

ERR_FAIL_COND_V(p_caret > carets.size(), "");
	StringBuilder selected_text;
	Vector<int> caret_edit_order = get_caret_index_edit_order();
	for (int i = caret_edit_order.size() - 1; i >= 0; i--) {
		int caret_idx = caret_edit_order[i];
		if (p_caret != -1 && p_caret != caret_idx) {
			continue;
		}
		if (!has_selection(caret_idx)) {
			continue;
		}
		selected_text += _base_get_text(get_selection_from_line(caret_idx), get_selection_from_column(caret_idx), get_selection_to_line(caret_idx), get_selection_to_column(caret_idx));
		if (p_caret == -1 && i != 0) {
			selected_text += "\n";
		}
	}
	return selected_text.as_string();
}
int TextEdit::get_selection_line(int p_caret) const {