### 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
ConstantNode *constant = alloc_node<ConstantNode>();
			ConstantNode::Value v;
			v.sint = tk.constant;
			constant->values.push_back(v);
			constant->datatype = TYPE_INT;
			expr = constant;
		} else if (tk.type == TK_UINT_CONSTANT) {
			ConstantNode *constant = alloc_node<ConstantNode>();
			ConstantNode::Value v;
			v.uint = tk.constant;
			constant->values.push_back(v);
			constant->datatype = TYPE_UINT;
			expr = constant;
		} else if (tk.type == TK_TRUE) {
			
			ConstantNode *constant = alloc_node<ConstantNode>();
			ConstantNode::Value v;
			v.boolean = true;
			constant->values.push_back(v);
			constant->datatype = TYPE_BOOL;
			expr = constant;
		} else if (tk.type == TK_FALSE) {
			
			ConstantNode *constant = alloc_node<ConstantNode>();
			ConstantNode::Value v;
			v.boolean = false;
			constant->values.push_back(v);
			constant->datatype = TYPE_BOOL;
			expr = constant;
		} else if (tk.type == TK_TYPE_VOID) {