### 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)

MessageQueue::get_singleton()->flush();
	CHECK(text_edit->is_caret_visible());
	CHECK(text_edit->get_first_visible_line() == 0);
	CHECK(text_edit->get_v_scroll() == 0);
	CHECK(text_edit->get_last_full_visible_line() == visible_lines - 11);
	CHECK(text_edit->get_last_full_visible_line_wrap_index() == 0);
	text_edit->adjust_viewport_to_caret();
	MessageQueue::get_singleton()->flush();
	CHECK(text_edit->get_first_visible_line() == 0);
	CHECK(text_edit->get_v_scroll() == 0);
	CHECK(text_edit->get_last_full_visible_line() == visible_lines - 11);
	CHECK(text_edit->get_last_full_visible_line_wrap_index() == 0);
	
	text_edit->set_line_wrapping_mode(TextEdit::LineWrappingMode::LINE_WRAPPING_NONE);
	MessageQueue::get_singleton()->flush();
	CHECK(text_edit->get_total_visible_line_count() == total_visible_lines);
	text_edit->set_line_as_first_visible(0);
	MessageQueue::get_singleton()->flush();
	CHECK(text_edit->get_first_visible_line() == 0);
	CHECK(text_edit->get_v_scroll() == 0);
	CHECK(text_edit->get_last_full_visible_line() == visible_lines - 1);
	CHECK(text_edit->get_last_full_visible_line_wrap_index() == 0);
	CHECK(text_edit->get_caret_wrap_index() == 0);
	
	text_edit->set_v_scroll_speed(10);
	CHECK(text_edit->get_v_scroll_speed() == 10);
	ERR_PRINT_OFF;
	text_edit->set_v_scroll_speed(-1);
	CHECK(text_edit->get_v_scroll_speed() == 10);
	text_edit->set_v_scroll_speed(0);