### Godot version

4.0.beta14

### System information

windows 10, gles 3, nvidia graphics

### Issue description

SCREEN_TEXTURE  was dropped in beta 14. The suggested replacement is to use ```uniform sampler2D SCREEN_TEXTURE : hint_screen_texture, filter_linear_mipmaps;```, but filter_linear_mipmaps is not recognized as a valid shader type hint and a shader using it fails to compile.

### Steps to reproduce

Create a canvas item shader and use the filter_linear_mipmaps type hint with a sampler2D uniform.

### Minimal reproduction project

N/A
Vector<Expression> expression;
	
	while (true) {
		Node *expr = nullptr;
		TkPos prepos = _get_tkpos();
		Token tk = _get_token();
		TkPos pos = _get_tkpos();
		bool is_const = false;
		if (tk.type == TK_PARENTHESIS_OPEN) {
			
			expr = _parse_and_reduce_expression(p_block, p_function_info);
			if (!expr) {
				return nullptr;
			}
			tk = _get_token();
			if (tk.type != TK_PARENTHESIS_CLOSE) {
				_set_error(RTR("Expected ')' in expression."));
				return nullptr;
			}
		} else if (tk.type == TK_FLOAT_CONSTANT) {
			ConstantNode *constant = alloc_node<ConstantNode>();
			ConstantNode::Value v;
			v.real = tk.constant;
			constant->values.push_back(v);
			constant->datatype = TYPE_FLOAT;
			expr = constant;
		} else if (tk.type == TK_INT_CONSTANT) {