### 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
bool found = false;
	for (int i = p_block->statements.size() - 1; i >= 0; i--) {
		if (p_block->statements[i]->type == Node::TYPE_CONTROL_FLOW) {
			ControlFlowNode *flow = static_cast<ControlFlowNode *>(p_block->statements[i]);
			if (flow->flow_op == p_op) {
				found = true;
				break;
			} else {
				if (_find_last_flow_op_in_op(flow, p_op) == OK) {
					found = true;
					break;
				}
			}
		} else if (p_block->statements[i]->type == Node::TYPE_BLOCK) {
			BlockNode *block = static_cast<BlockNode *>(p_block->statements[i]);
			if (_find_last_flow_op_in_block(block, p_op) == OK) {
				found = true;
				break;
			}
		}
	}
	if (found) {
		return OK;
	}
	return FAILED;
}
static int _get_first_ident_pos(const String &p_code) {