[FEATURE] Explore renaming the job scheduler .opendistro-job-scheduler-lock to .locks

[cwperks]

Is your feature request related to a problem?

I envision something more like how the .kibana indices are handled.

With the .kibana indices there is an alias that points to a concrete index.

i.e.

.kibana -> .kibana_1

on a version upgrade it creates an index called .kibana_2 migrates the saved objects and then updates the alias.

I think we should do the same for job scheduler as 1) a way to rename the index as it uses legacy naming and 2) allows an operator to update mappings between versions to avoid problems like opensearch-project/index-management#1471