### 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)

CHECK(text_edit->get_text() == "new line\nswap");
			CHECK(text_edit->get_caret_line() == 0);
			CHECK(text_edit->get_caret_column() == 8);
			CHECK_FALSE(text_edit->has_selection());
			SIGNAL_CHECK("lines_edited_from", lines_edited_args);
			SIGNAL_CHECK("text_changed", empty_signal_args);
			SIGNAL_CHECK("caret_changed", empty_signal_args);
			SIGNAL_CHECK_FALSE("text_set");
		}
		SIGNAL_UNWATCH(text_edit, "text_set");
		SIGNAL_UNWATCH(text_edit, "text_changed");
		SIGNAL_UNWATCH(text_edit, "lines_edited_from");
		SIGNAL_UNWATCH(text_edit, "caret_changed");
	}
	SUBCASE("[TextEdit] indent level") {
		CHECK(text_edit->get_indent_level(0) == 0);
		CHECK(text_edit->get_first_non_whitespace_column(0) == 0);
		text_edit->set_line(0, "a");
		CHECK(text_edit->get_indent_level(0) == 0);
		CHECK(text_edit->get_first_non_whitespace_column(0) == 0);
		text_edit->set_line(0, "\t");
		CHECK(text_edit->get_indent_level(0) == 4);
		CHECK(text_edit->get_first_non_whitespace_column(0) == 1);
		text_edit->set_tab_size(8);
		CHECK(text_edit->get_indent_level(0) == 8);
		text_edit->set_line(0, "\t a");
		CHECK(text_edit->get_first_non_whitespace_column(0) == 2);
		CHECK(text_edit->get_indent_level(0) == 9);
	}
	SUBCASE("[TextEdit] selection") {