Implement the ability to produce the command to run aggregation manually

[dperique]

We can do this:

tag=4.15.0-0.nightly-2024-01-11-034529
 job_name=periodic-ci-openshift-release-master-ci-4.15-e2e-azure-ovn-upgrade
 start_time="20xx-xx-xxTxx:xx:xxZ"
 ./job-run-aggregator analyze-job-runs \
   --timeout=7h \
   --google-service-account-credential-file some-thing.json \
   --job ${job_name} \
   --payload-tag ${tag} \
   --job-start-time ${start_time} \
   --working-dir /tmp/test_analysis/${tag}/${job_name}

We should be able to dump out that command so the user can build their own job-run-aggregator and run aggregation manually.