doctrine/dbal 4 support

[amacrobert-meq]

Subject

Support for doctrine/dbal 4.

Closes #636.

Changelog

### Added
- doctrine/dbal 4.x support

[amacrobert-meq]

@VincentLanglet et al -- please consider this for a 1.19.0 release. It retains dbal 3 compatibility so no major version upgrade should be needed.

[VincentLanglet]

@VincentLanglet et al -- please consider this for a 1.19.0 release. It retains dbal 3 compatibility so no major version upgrade should be needed.

Sure, but tests should be green for this, and they are all failing.

[core23]

Can you please fix the test @amacrobert-meq ?

[amacrobert-meq]

Can you please fix the test @amacrobert-meq ?

I've taken it as far as I can for the foreseeable future given other priorities, and am now using a fork that looks like this PR and seems to work. I think it needs someone more familiar with the internals or willing to learn to take it over the finish line