### 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)

for (int i = 0; i < carets.size(); i++) {
		if (p_select) {
			_pre_shift_selection(i);
		} else {
			deselect(i);
		}
		int cur_wrap_index = get_caret_wrap_index(i);
		if (cur_wrap_index < get_line_wrap_count(get_caret_line(i))) {
			set_caret_line(get_caret_line(i), i == 0, false, cur_wrap_index + 1, i);
		} else if (get_caret_line(i) == get_last_unhidden_line()) {
			set_caret_column(text[get_caret_line(i)].length());
		} else {
			int new_line = get_caret_line(i) + get_next_visible_line_offset_from(CLAMP(get_caret_line(i) + 1, 0, text.size() - 1), 1);
			set_caret_line(new_line, i == 0, false, 0, i);
		}
		if (p_select) {
			_post_shift_selection(i);
		}
	}
	merge_overlapping_carets();
}
void TextEdit::_move_caret_to_line_start(bool p_select) {