### 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
}
									if (!tk.is_integer_constant()) {
										_set_error(RTR("Expected an integer constant."));
										return ERR_PARSE_ERROR;
									}
									custom_instance_index = tk.constant;
									current_uniform_instance_index_defined = true;
									if (custom_instance_index >= MAX_INSTANCE_UNIFORM_INDICES) {
										_set_error(vformat(RTR("Allowed instance uniform indices must be within [0..%d] range."), MAX_INSTANCE_UNIFORM_INDICES - 1));
										return ERR_PARSE_ERROR;
									}
									tk = _get_token();
									if (tk.type != TK_PARENTHESIS_CLOSE) {
										_set_expected_error(")");
										return ERR_PARSE_ERROR;
									}
								} break;
								case TK_HINT_SCREEN_TEXTURE: {
									new_hint = ShaderNode::Uniform::HINT_SCREEN_TEXTURE;
									--texture_uniforms;
									--texture_binding;
								} break;
								case TK_HINT_NORMAL_ROUGHNESS_TEXTURE: {
									new_hint = ShaderNode::Uniform::HINT_NORMAL_ROUGHNESS_TEXTURE;
									--texture_uniforms;
									--texture_binding;
								} break;
								case TK_HINT_DEPTH_TEXTURE: {
									new_hint = ShaderNode::Uniform::HINT_DEPTH_TEXTURE;
									--texture_uniforms;