Improve `magento:set_cache_prefix` & `magento:cleanup_cache_prefix` Tasks

[itaymesh]

Description:

This pull request enhances the magento:set_cache_prefix and magento:cleanup_cache_prefix tasks in the Magento deployment script. The updates focus on improving flexibility and accuracy during deployment.

Key Changes:

1. Introduction of magento_cache_id_prefix Variable:

   • Allows for customizable cache ID prefixes, enhancing flexibility. If not set, it defaults to using the alias.

2. Support for Custom Subfolder with magento_dir Variable:

   • Introduced the magento_dir variable to support Magento installations in custom subfolders, ensuring correct path handling for environment configuration files.