### 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)

float rows = p_pos.y;
	rows -= theme_cache.style_normal->get_margin(SIDE_TOP);
	rows /= get_line_height();
	rows += _get_v_scroll_offset();
	int first_vis_line = get_first_visible_line();
	int row = first_vis_line + Math::floor(rows);
	int wrap_index = 0;
	if (get_line_wrapping_mode() != LineWrappingMode::LINE_WRAPPING_NONE || _is_hiding_enabled()) {
		Point2i f_ofs = get_next_visible_line_index_offset_from(first_vis_line, first_visible_line_wrap_ofs, rows + (1 * SIGN(rows)));
		wrap_index = f_ofs.y;
		if (rows < 0) {
			row = first_vis_line - (f_ofs.x - 1);
		} else {
			row = first_vis_line + (f_ofs.x - 1);
		}
	}
	if (row < 0) {
		row = 0;
	}
	if (row >= text.size()) {
		row = text.size() - 1;
	}
	int visible_lines = get_visible_line_count_in_range(first_vis_line, row);
	if (rows > visible_lines) {
		if (!p_allow_out_of_bounds) {
			return Point2i(-1, -1);