### 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)

#include "scene/gui/text_edit.h"
#include "tests/test_macros.h"
namespace TestTextEdit {
TEST_CASE("[SceneTree][TextEdit] text entry") {
	SceneTree::get_singleton()->get_root()->set_physics_object_picking(false);
	TextEdit *text_edit = memnew(TextEdit);
	SceneTree::get_singleton()->get_root()->add_child(text_edit);
	text_edit->grab_focus();
	Array empty_signal_args;
	empty_signal_args.push_back(Array());
	SUBCASE("[TextEdit] text entry") {
		SIGNAL_WATCH(text_edit, "text_set");
		SIGNAL_WATCH(text_edit, "text_changed");
		SIGNAL_WATCH(text_edit, "lines_edited_from");
		SIGNAL_WATCH(text_edit, "caret_changed");
		Array args1;
		args1.push_back(0);
		args1.push_back(0);
		Array lines_edited_args;
		lines_edited_args.push_back(args1);
		lines_edited_args.push_back(args1.duplicate());
		SUBCASE("[TextEdit] clear and set text") {
			
			text_edit->clear();
			MessageQueue::get_singleton()->flush();
			CHECK(text_edit->get_text() == "");
			CHECK(text_edit->get_caret_column() == 0);
			CHECK(text_edit->get_line_count() == 1);
			SIGNAL_CHECK("text_set", empty_signal_args);
			SIGNAL_CHECK("lines_edited_from", lines_edited_args);