### 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
for (const KeyValue<StringName, ShaderLanguage::FunctionInfo> &E : p_functions) {
		if (E.value.built_ins.has(p_name)) {
			return true;
		}
	}
	return false;
}
Error ShaderLanguage::_find_last_flow_op_in_op(ControlFlowNode *p_flow, FlowOperation p_op) {
	bool found = false;
	for (int i = p_flow->blocks.size() - 1; i >= 0; i--) {
		if (p_flow->blocks[i]->type == Node::TYPE_BLOCK) {
			BlockNode *last_block = static_cast<BlockNode *>(p_flow->blocks[i]);
			if (_find_last_flow_op_in_block(last_block, p_op) == OK) {
				found = true;
				break;
			}
		}
	}
	if (found) {
		return OK;
	}
	return FAILED;
}
Error ShaderLanguage::_find_last_flow_op_in_block(BlockNode *p_block, FlowOperation p_op) {