ashb opened a new pull request, #54231:
URL: https://github.com/apache/airflow/pull/54231

   There were two things blocking this:
   
   1) The revision heads map didn't have any 2.11.x versions in it, so the
      previous implementation of `_get_version_revision` was only looking within
      the same <major.minor> pathc version.
   
      We change it to rely on the fact that our pre-commit checks ensure this 
map
      is ordered, and iterate over the dictionary reversed, and when we find the
      first thing less than the target revision we use that (direct equal is
      handled already above)
   
   2) The `ab_*` tables not existing were blocking the migration. Part of this 
is
      now fixable manually with #54227, but I have decided that since FAB was
      required and the only option in 2.x, so I have decided to just create the
      tables if they are missing
   
      In order to try and cope with possible future changes I create the tables
      at the latest version and then downgrade to the oldest known revision.
   
      This is all handled in a `reset_to_2_x()` method on the FABDBManager, with
      a fallback to just blindly create the tables from the ORM for versions of
      the provider that don't yet have that function.
   
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