Ability to list hidden tables

[radeusgd]

The PR #7072 introduced hidden tables used for the dry runs.

The tables are internal temporary tables, so they are not displayed to the user in the Connection.tables list.

However, sometimes the user may want to display them. So we want to add an option show_internal_enso_tables:Boolean = False that will allow to request (by setting it to True) to show these tables.

I did not add them straight away, because that will make the Connection.tables node very big, for a feature that is rarely needed.

This ticket should only be attempted once the new node design is completed and so we can make sure that the new show_internal_enso_tables flag is hidden by default and is displayed only once the node is expanded.

The implementation itself is trivial - we already have the logic in a private function get_tables_advanced. We just need to connect this logic and ensure that the newly added show_internal_enso_tables parameter is not displayed by default.

Once this is done, the get_tables_advanced will be practically equivalent to the main tables so they can be merged (the private method can be removed, implementation moved back to tables).

[radeusgd]

Blocked by #5922 (if I got the ticket right - precisely by the ability to have parameters that are not displayed by default and only show up when the node is expanded).