Allow `doctrine/dbal` v3

Drop Symfony 5.3 and support Symfony 6.0

Allow installation of psr/log v2 or v3

Update config for monorepo-split action

Composer > Add handy scripts

This makes it easier to run tests, phpstan and cs fixer.

Bump TomasVotruba/github-action-monorepo-split from 1.1 to 2.0

Bumps [TomasVotruba/github-action-monorepo-split](https://github.com/TomasVotruba/github-action-monorepo-split) from 1.1 to 2.0.
- [Release notes](https://github.com/TomasVotruba/github-action-monorepo-split/releases)
- [Commits](danharrin/monorepo-split-github-action@1.1...70e57e3)

Signed-off-by: dependabot[bot] <support@github.com>

PHPStan > Use Symfony extension

Revert "Fix"

This reverts commit b5210b8.