Split configuration

[raziel057]

For better readability and to fix #412
As proposed here #412 (comment)

Workarround for PHP issue php/php-src#8315

[raziel057]

Failing tests for PHPUnit Test for PHP < 7.4 is not related to the Split of config but to

Remaining direct deprecation notices (1)

  1x: Since symfony/monolog-bridge 5.4: "Symfony\Bridge\Monolog\Handler\SwiftMailerHandler" is deprecated and will be removed in 6.0.
    1x in XmlMonologExtensionTest::testSingleEmailRecipient from Symfony\Bundle\MonologBundle\Tests\DependencyInjection

[raziel057]

Hi there, it seems that the ticket on PHP side (marked as Feature php/php-src#8315) will not be resolved soon I propose to accept the following PR where the config is split in multiple sub parts to avoid to encounter the PHP issue.

[ahajzik-crido]

Could you process this PR? Even though we have production env on linux, we develop on windows. It is hard to work doing "cache:clear" almost every time we need to test changes. We can't live long time with this issue. If it si not going to be solved we will be forced to abandon monolog logger.

[Seldaek]

Thanks - kinda hard to review all this code shifting, but I'm hoping you did it diligently :)