Symfony 6.4 upgrade

[cmuench]

Newer Magento Versions are using Symfony 6.4.x components.
We need to upgrade the source code of n98-magerun2 to the newer LTS.
We can do this, because we have dropped the PHP 7 support with the release of v8.0.0.

Current Implementation

We use the old LTS Version 5.4 in n98-magerun2.

Suggested Enhancement

Upgrade all Symfony Components to 6.4 LTS or 7.2 LTS.

• https://symfony.com/releases/6.4
• https://symfony.com/releases/7.2

We have to make a decision here first.

Expected Benefits

Aligning dependencies to current Magento versions.