* fix: resolve global env variable becoming undefined on script execution
Fixes an issue where global disabled environment variables were becoming undefined during request execution when the pre request script is non-empty.
The update ensures that global variables persist as expected and are correctly referenced throughout the request lifecycle.
Closes#5772.
* feat: added test for checking proper global env update through scripts
* refactor: updated comments for more readability and added a new data-testid in modal.
