### 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
#ifdef DEBUG_ENABLED
					keyword_completion_context = CF_GLOBAL_SPACE;
#endif 
					completion_type = COMPLETION_NONE;
					current_uniform_hint = ShaderNode::Uniform::HINT_NONE;
					current_uniform_filter = FILTER_DEFAULT;
					current_uniform_repeat = REPEAT_DEFAULT;
					current_uniform_instance_index_defined = false;
				} else { 
					ShaderNode::Varying varying;
					varying.type = type;
					varying.precision = precision;
					varying.interpolation = interpolation;
					varying.tkpos = prev_pos;
					varying.array_size = array_size;
					tk = _get_token();
					if (tk.type != TK_SEMICOLON && tk.type != TK_BRACKET_OPEN) {
						if (array_size == 0) {
							_set_expected_error(";", "[");
						} else {
							_set_expected_error(";");
						}
						return ERR_PARSE_ERROR;
					}
					if (tk.type == TK_BRACKET_OPEN) {
						Error error = _parse_array_size(nullptr, constants, true, nullptr, &varying.array_size, nullptr);
						if (error != OK) {
							return error;
						}
						tk = _get_token();