Currently, `base_dependent_view_info::_base_non_pk_columns_in_view_pk`
field keeps a list of non-primary-key columns from the base table which
are a part of the view's primary key. Because the current code does not
allow indexes on static columns yet, the columns kept in the
aforementioned field are always assumed to be regular columns of the
base table and are kept as `column_id`s which do not contain information
about the column kind.
This commit splits the `_base_non_pk_columns_in_view_pk` field into two,
one for regular columns and the other for static columns, so that it is
possible to keep both kinds of columns in `base_dependent_view_info` and
the structure can be used for secondary indexes on static columns.
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