### 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
ERR_FAIL_V(nullptr); 
			}
#ifdef DEBUG_ENABLED
			if (check_warnings && HAS_WARNING(ShaderWarning::FLOAT_COMPARISON_FLAG) && (op == OP_EQUAL || op == OP_NOT_EQUAL) &&
					(!expression[i - 1].is_op && !expression[i + 1].is_op) &&
					(expression[i - 1].node->get_datatype() == TYPE_FLOAT && expression[i + 1].node->get_datatype() == TYPE_FLOAT)) {
				_add_line_warning(ShaderWarning::FLOAT_COMPARISON);
			}
#endif 
			if (priority < min_priority) {
				
				
				next_op = i;
				min_priority = priority;
				is_unary = unary;
				is_ternary = ternary;
			}
		}
		ERR_FAIL_COND_V(next_op == -1, nullptr);
		
		if (is_unary) {
			int expr_pos = next_op;
			while (expression[expr_pos].is_op) {
				expr_pos++;
				if (expr_pos == expression.size()) {
					
					_set_error(RTR("Unexpected end of expression."));
					return nullptr;
				}
			}