The links in convertException gives 404, i'm not 100% if I updated them correct, or if the e.g. should be update to 8.0 already.

https://dev.mysql.com/doc/refman/8.0/en/server-error-reference.html
https://dev.mysql.com/doc/refman/8.0/en/client-error-reference.html

This will allow for subsequent fetches in different modes.

This return type is conditional to $params['wrapperClass']. Luckily,
recent versions of Psalm allow documenting it properly.
See https://github.com/vimeo/psalm/issues/3277

Note that phpstan is not able to understand this yet, but still attempts
to, hence the extra ignore rules.

Not all RDBMS have a concept of database, apparently (see SQLAnywhere).
Those who do not should pass in a string to stay compatible with the
signature.

This makes it consistent with doctrine-bundle command

Let RetryableException extend from the Throwable interface to prevent errors in Psalm if catching it

Checking that the platform supports foreign key is not the right case
here, because we should check if we can create them by themselves, after
the table is created. It is not the case for Sqlite.

Closes #3990

Upstream libs and tools have improvements that make them unnecessary.