* common-utils overwrites .zshrc coming from image built with common-utils already

* version bumped and added scenario to test the user issue

* cp command failing fix test

* bump version reverted

* fixed the pipeline failures

* discarded diff logic and introduced new one

* Update src/common-utils/main.sh

* instead of overwritting, template file will be appended to existing .zshrc file if INSTALL_OH_MY_ZSH_CONFIG is true

* removed if statement to check .zshrc file exists

* if condition added to check user_rc_file exist

* linter error fixed

* optimize duplication for template_path and user_rc_file logic

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Co-authored-by: Samruddhi Khandale <samruddhikhandale@github.com>