[Feature] ch18694 add new comand 'env' into primehub-install

[kentwelcome]

PR checklist

• [x] Ensure you have added or ran the appropriate tests for your PR.
• [x] DCO signed

What type of PR is this? Feature

What this PR does / why we need it: Add new command env into primehub-install script

Which issue(s) this PR fixes: ch18694

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[popcornylu]

LGTM