### 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 (is_token_precision(tk.type)) {
					precision = get_token_precision(tk.type);
					tk = _get_token();
#ifdef DEBUG_ENABLED
					if (keyword_completion_context & CF_INTERPOLATION_QUALIFIER) {
						keyword_completion_context ^= CF_INTERPOLATION_QUALIFIER;
					}
					if (keyword_completion_context & CF_PRECISION_MODIFIER) {
						keyword_completion_context ^= CF_PRECISION_MODIFIER;
					}
					if (_lookup_next(next)) {
						if (is_token_datatype(next.type)) {
							keyword_completion_context = CF_UNSPECIFIED;
						}
					}
#endif 
				}
				if (shader->structs.has(tk.text)) {
					if (is_uniform) {
						_set_error(vformat(RTR("The '%s' data type is not supported for uniforms."), "struct"));
						return ERR_PARSE_ERROR;
					} else {
						_set_error(vformat(RTR("The '%s' data type not allowed here."), "struct"));
						return ERR_PARSE_ERROR;
					}
				}
				if (!is_token_datatype(tk.type)) {
					_set_error(RTR("Expected data type."));
					return ERR_PARSE_ERROR;