Allow changing the default cache size #1932
Description
Currently the default GitHub Cache size is set to 10GB, but other backward compatible systems may have different limitations in place.
For example, in our case we are using private cache server with compatible GitHub API, but our limit is 1TB.
By allowing users to change the default cache file size limit we would open an ability to use actions/toolkit for our private server without the necessity to publish the fork package of actions/toolkit.