[Installer] Enhance Multiple PHP Versions Installation

[joglomedia]

Enhancing multiple PHP versions installation and removal process.

There are currently 3 methods available to install PHP using LEMPer Stack installer

1. Automatic installation (unattended install) which all parameters pre-configured on .env config file, done via default LEMPer installation ./install.sh with AUTO_INSTALL parameter set to true.
2. Manual installation (interactive mode) which all parameters depend on user supplied value during installation process, done via default LEMPer installation ./install.sh with AUTO_INSTALL parameter set to false.
3. Manual installation (cli mode) which all parameters passed via cli argument, done via separately script execution ./scripts/install_php.sh with cli argument --php-version passed multiple times, e.g. ./scripts/install_php.sh --php-version=7.4 --php-version=8.0

Since our script by default pre-loaded all parameters from .env config file including PHP versions defined as PHP_VERSIONS, by using method 2 and 3 should also include those predefined versions.