Symfony 7 compatibility

[b-michalski-expondo]

Is your feature request related to a problem? Please describe.
Recently I wanted to update symfony from v6 to v7 in my project but I got such an error commercetools/commercetools-sdk 10.3.0 requires symfony/cache ^3.0 || ^4.0 || ^5.0 || ^6.0 -> found symfony/cache[v3.1.0, ..., v3.4.47, v4.0.0, ..., v4.4.48, v5.0.0, ..., v5.4.39, v6.0.0, ..., v6.4.7] but these were not loaded, likely because it conflicts with another require

Describe the solution you'd like
Add ^7.0 version to compatibility list