This script generates json test cases for each supported output format.
It requires an architecure, distro, osbuild store, and output directory
as input. There is also a json object which maps from output format to a
test case request which includes the compose request and boot type.
The script uses these test case requests to call the generate-test-case
script and then outputs the resulting json test cases to files in the
specified output directory.
The generate-test-cases no longer maps from output format to boot
type. Instead, the boot data is passed in through the standard input
alongside the composer-request object.
The script generate-test-cases only creates a single test case per run.
Therefore, the name should be singular. Also, this script has been moved
to a directory which will contain all test case generators.
