[kokoro] Make the private component rewrite rules more generic. (#4294)
[kokoro] Make the private component rewrite rules more generic. (#4294)

The script will now scale up as we add more private components without the need to implement one-off rewrite rules as new private components are imported.
material-components/material-components-ios,randallli/material-components-ios,material-components/material-components-ios,randallli/material-components-ios,material-components/material-components-ios,material-components/material-components-ios,randallli/material-components-ios,material-components/material-components-ios,randallli/material-components-ios,randallli/material-components-ios,randallli/material-components-ios