### 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
_set_error(vformat(RTR("Unknown array size is forbidden in that context.")));
			return ERR_PARSE_ERROR;
		}
		if (r_unknown_size != nullptr) {
			*r_unknown_size = true;
		}
	} else {
		int array_size = 0;
		if (!tk.is_integer_constant() || ((int)tk.constant) <= 0) {
			_set_tkpos(pos);
			Node *n = _parse_and_reduce_expression(p_block, p_function_info);
			if (n) {
				if (n->type == Node::TYPE_VARIABLE) {
					VariableNode *vn = static_cast<VariableNode *>(n);
					if (vn) {
						ConstantNode::Value v;
						DataType data_type;
						bool is_const = false;
						_find_identifier(p_block, false, p_function_info, vn->name, &data_type, nullptr, &is_const, nullptr, nullptr, &v);
						if (is_const) {
							if (data_type == TYPE_INT) {
								int32_t value = v.sint;
								if (value > 0) {
									array_size = value;
								}
							} else if (data_type == TYPE_UINT) {
								uint32_t value = v.uint;
								if (value > 0U) {
									array_size = value;
								}