Sharding and autosharding introduced a number of manifests that are
very similar, but not identical to the standard manifests. This
introduces generating all manifests using jsonnet and moves them to
the explicit `/examples` directory.
* Refactored kube_job_status_start_time & kube_job_status_completion_time to Gauge.
* e2e script moved to tests directory.
* Added options for e2e testsuite.
* Cleanun function in e2e.