### 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(p_caret > carets.size());
	begin_complex_operation();
	Vector<int> caret_edit_order = get_caret_index_edit_order();
	for (const int &i : caret_edit_order) {
		if (p_caret != -1 && p_caret != i) {
			continue;
		}
		delete_selection(i);
		int from_line = get_caret_line(i);
		int from_col = get_caret_column(i);
		int new_column, new_line;
		_insert_text(from_line, from_col, p_text, &new_line, &new_column);
		_update_scrollbars();
		set_caret_line(new_line, false, true, 0, i);
		set_caret_column(new_column, i == 0, i);
		adjust_carets_after_edit(i, new_line, new_column, from_line, from_col);
	}
	if (!ime_text.is_empty()) {
		for (int i = 0; i < carets.size(); i++) {
			String t;
			if (get_caret_column(i) >= 0) {
				t = text[get_caret_line(i)].substr(0, get_caret_column(i)) + ime_text + text[get_caret_line(i)].substr(get_caret_column(i), text[get_caret_line(i)].length());
			} else {
				t = ime_text;