Command to create a raw alembic_version table

[kasium]

Discussed in #962

^{Originally posted by kasium November 10, 2021}
Hey,
not sure if this use case is somehow common, but I would like to request it:

In my application, I use the alembic_version table as a synchronization point, meaning that multiple instances of the app are starting in parallel and will try to lock the alembic_version table in order to execute a migration. However, this approach only works if the alembic_version table already exists.

So, my question would be, if it would be possible to a command to generate a raw alembic_version table? It would help me a lot. Currently I use heads and stamp together, but the code doesn't make it obvious want I want to do

[sqla-tester]

Kai Mueller has proposed a fix for this issue in the main branch:

Add new ensure_version command https://gerrit.sqlalchemy.org/c/sqlalchemy/alembic/+/3302