### 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
used_structs[struct_name].used = true;
				}
#endif 
			}
#ifdef DEBUG_ENABLED
			uint32_t precision_flag = CF_PRECISION_MODIFIER;
			keyword_completion_context = CF_DATATYPE;
			if (!is_token_precision(tk.type)) {
				if (!is_struct) {
					keyword_completion_context |= precision_flag;
				}
			}
#endif 
			bool is_const = false;
			if (tk.type == TK_CONST) {
				is_const = true;
				tk = _get_token();
				if (!is_struct) {
					is_struct = shader->structs.has(tk.text); 
					struct_name = tk.text;
				}
			}
			DataPrecision precision = PRECISION_DEFAULT;
			if (is_token_precision(tk.type)) {
				precision = get_token_precision(tk.type);
				tk = _get_token();
				if (!is_struct) {
					is_struct = shader->structs.has(tk.text); 
				}
#ifdef DEBUG_ENABLED