update execute() arg formats in modules and tests

update execute() arg formats in modules and tests

continuing with producing a SQLAlchemy 1.4.0b2 that internally
does not emit any of its own 2.0 deprecation warnings,
migrate the *args and **kwargs passed to execute() methods
that now must be a single list or dictionary.

Alembic 1.5 is again waiting on this internal consistency to
be present so that it can pass all tests with no 2.0
deprecation warnings.

Change-Id: If6b792e57c8c5dff205419644ab68e631575a2fa