Installer: decide how to handle NodeJS version

### Description

In the Device Agent Installer script we have a hardcoded version of NodeJS which script will install ("bundled" node approach).
The current approach with pinning to the exact version was selected to create an installer which will provide a predictable and consistent environment for the device-agent package.

This task aims to collect a feedback about current approach vs being more liberal and define only the major nodejs version to install and let the script to pick up the latest one available at the time of installation.

Once decided, proiper solution should be implemented.

### Epic/Story

_No response_