[DBAL-924] Fix SQLite integer type primary autoincrement columns

This is a followup PR for https://github.com/doctrine/dbal/pull/618 and https://github.com/doctrine/dbal/pull/619.
It provides a compromise between PK autoincrement column declaration and differenciation of different integer types.
Each integer type column that is declared as an autoincrement column will fallback to `INTEGER` SQL declaration while keeping the possibility to create non-autoincrement columns for each integer type.
There should also be no comparator issues left with this PR generating useless SQL diffs.