### 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)

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] select all") {
			text_edit->select_all();
			CHECK_FALSE(text_edit->has_selection());
			ERR_PRINT_OFF;
			CHECK(text_edit->get_selection_from_line() == -1);
			CHECK(text_edit->get_selection_from_column() == -1);
			CHECK(text_edit->get_selection_to_line() == -1);
			CHECK(text_edit->get_selection_to_column() == -1);
			CHECK(text_edit->get_selected_text() == "");
			ERR_PRINT_ON;
			text_edit->set_text("test\nselection");
			SEND_GUI_ACTION("ui_text_select_all");
			CHECK(text_edit->get_viewport()->is_input_handled());
			MessageQueue::get_singleton()->flush();
			CHECK(text_edit->get_selected_text() == "test\nselection");
			CHECK(text_edit->has_selection());
			CHECK(text_edit->get_selection_from_line() == 0);
			CHECK(text_edit->get_selection_from_column() == 0);
			CHECK(text_edit->get_selection_to_line() == 1);
			CHECK(text_edit->get_selection_to_column() == 9);