Cleanup tempest-dsvm-large-ops jobs

Add new template for large-ops jobs. There is common usage
pattern relate to this kind of jobs.
2 jobs are added to check and gate pipelines, so it makes
sense to create tempalte and reduce amount of LOCs

Change-Id: I82658444fe1d5745c296aea83a85dd7ea975a461
Merge "Cleanup tempest-dsvm-large-ops jobs"