DrevOps scripts should not be changed after installation #592
Description
Currently, installation changes some of the scripts based on the tokenised values, such as theme name or site URL.
After installation script runs, some of the tokens are replaced in the codebase. But these tokens are also replaced within DrevOps scripts. We want the tokens to be replaced only within code that is a project-relevant rather then generic scripts.
Need to update installer and scripts to use environment variables instead to make sure that future updates do not require any generic scripts modifications.