### 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
StringName struct_name;
				bool is_local = false;
				if (p_block && p_block->block_tag != SubClassTag::TAG_GLOBAL) {
					int idx = 0;
					bool found = false;
					while (builtin_func_defs[idx].name) {
						if (builtin_func_defs[idx].tag == p_block->block_tag && builtin_func_defs[idx].name == identifier) {
							found = true;
							break;
						}
						idx++;
					}
					if (!found) {
						_set_error(vformat(RTR("Unknown identifier in expression: '%s'."), String(identifier)));
						return nullptr;
					}
				} else {
					if (!_find_identifier(p_block, false, p_function_info, identifier, &data_type, &ident_type, &is_const, &array_size, &struct_name)) {
						if (identifier == "SCREEN_TEXTURE" || identifier == "DEPTH_TEXTURE" || identifier == "NORMAL_ROUGHNESS_TEXTURE") {
							String name = String(identifier);
							String name_lower = name.to_lower();
							_set_error(vformat(RTR("%s has been removed in favor of using hint_%s with a uniform.\nTo continue with minimal code changes add 'uniform sampler2D %s : hint_%s, filter_linear_mipmaps;' near the top of your shader."), name, name_lower, name, name_lower));
							return nullptr;
						}
						_set_error(vformat(RTR("Unknown identifier in expression: '%s'."), String(identifier)));
						return nullptr;
					}
					if (ident_type == IDENTIFIER_VARYING) {
						TkPos prev_pos = _get_tkpos();
						Token next_token = _get_token();