superset-init-db pod failed on upgrade

[korjavin]

A clear and concise description of what the bug is.

How to reproduce the bug

1. Upgrade helm chart to current one
2. Get superset:latest (which is only god knows what) as image
3. init-db failed with the message:

>> Copy 56 metrics to sl_columns...
   Link metric columns to datasets...
>> Run postprocessing on 700 columns
<string>:3: SAWarning: TypeDecorator UUIDType() will not produce a cache key because the ``cache_ok`` attribute is not set to True.  This can have significant performance implications including some performance degradations in comparison to prior SQLAlchemy versions.  Set this attribute to True if this type object's state is safe to use in a cache key, or False to disable this warning. (Background on this error at: https://sqlalche.me/e/14/cprf)
/app/superset/migrations/versions/2022-04-01_14-38_a9422eeaae74_new_dataset_models_take_2.py:732: SAWarning: TypeDecorator UUIDType() will not produce a cache key because the ``cache_ok`` attribute is not set to True.  This can have significant performance implications including some performance degradations in comparison to prior SQLAlchemy versions.  Set this attribute to True if this type object's state is safe to use in a cache key, or False to disable this warning. (Background on this error at: https://sqlalche.me/e/14/cprf)
  count = session.query(func.count()).select_from(query).scalar()
Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/sqlalchemy/engine/base.py", line 1819, in _execute_context
    self.dialect.do_execute(
  File "/usr/local/lib/python3.8/site-packages/sqlalchemy/engine/default.py", line 732, in do_execute
    cursor.execute(statement, parameters)
psycopg2.errors.DuplicateAlias: table name "sl_columns" specified more than once