### 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
case '*': { 
						char_idx++;
						while (true) {
							if (GETCHAR(0) == 0) {
								return _make_token(TK_EOF);
							}
							if (GETCHAR(0) == '*' && GETCHAR(1) == '/') {
								char_idx += 2;
								break;
							} else if (GETCHAR(0) == '\n') {
								tk_line++;
							}
							char_idx++;
						}
					} break;
					case '/': { 
						while (true) {
							if (GETCHAR(0) == '\n') {
								tk_line++;
								char_idx++;
								break;
							}
							if (GETCHAR(0) == 0) {
								return _make_token(TK_EOF);
							}
							char_idx++;
						}
					} break;
					case '=': { 
						char_idx++;