I am sharing you the code to do this

set Link To “Media File”
add_action( 'after_setup_theme', 'default_attachment_display_settings' );
function default_attachment_display_settings() {
update_option( 'image_default_link_type', 'file' );
}
set Link To “None”
add_action( 'after_setup_theme', 'default_attachment_display_settings' );
function default_attachment_display_settings() {
update_option( 'image_default_link_type', 'none' );
}