Removed name parameter from Connection::lastInsertId(string $name) problematic for PostgreSQL

[lemon-juice]

Bug Report

Q	A
Version	4.*
Previous Version if the bug is a regression	3.*

Summary

In versions 3 and earlier method Connection::lastInsertId() accepted an optional sequence name. Version 3 made this deprecated and later it was removed. The rationale is described in #4687.

Current behaviour

However, there are scenarios when the sequence name is necessary, at least in PostgreSQL:

1. There is an insert trigger on table A, and the trigger inserts a new row into table B.
2. Both table A and B have an identity column.
3. I insert a new row into table A with Connection::insert() method or with pure SQL.
4. Connection::lastInsertId() returns value of identity column from table B (because of the trigger) but I want the value from table A and there's no way to do it with this method any longer. I need to use workarounds like manually construct an INSERT ... RETURNING id query or run a query like SELECT currval('table_id_seq').

Expected behaviour

I should be able to specify the name of the sequence like in the old versions for cases with triggers like described above.