### 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
fail = true;
							break;
						}
					}
					if (get_scalar_type(args[i]) == args[i] && p_func->arguments[i + 1]->type == Node::TYPE_CONSTANT && convert_constant(static_cast<ConstantNode *>(p_func->arguments[i + 1]), builtin_func_defs[idx].args[i])) {
						
					} else if (args[i] != builtin_func_defs[idx].args[i]) {
						fail = true;
						break;
					}
				}
				if (!fail) {
					if (RenderingServer::get_singleton()->is_low_end()) {
						if (builtin_func_defs[idx].high_end) {
							fail = true;
							unsupported_builtin = true;
							builtin_idx = idx;
						}
					}
				}
				if (!fail && argcount < 4 && builtin_func_defs[idx].args[argcount] != TYPE_VOID) {
					fail = true; 
				}
				if (!fail) {
					{
						int constarg_idx = 0;
						while (builtin_func_const_args[constarg_idx].name) {
							if (String(name) == builtin_func_const_args[constarg_idx].name) {
								int arg = builtin_func_const_args[constarg_idx].arg + 1;
								if (p_func->arguments.size() <= arg) {