SQLite reflection ignores schema internal names

SQLite reflection ignores schema internal names

Added new parameter to SQLite for reflection methods called
``sqlite_include_internal=True``; when omitted, local tables that start
with the prefix ``sqlite_``, which per SQLite documentation are noted as
"internal schema" tables such as the ``sqlite_sequence`` table generated to
support "AUTOINCREMENT" columns, will not be included in reflection methods
that return lists of local objects. This prevents issues for example when
using Alembic autogenerate, which previously would consider these
SQLite-generated tables as being remove from the model.

Fixes: #8234
Change-Id: I36ee7a053e04b6c46c912aaa0d7e035a5b88a4f9