fix the setting of environment variable ARGOCD_CONTROLLER_REPLICAS fo…

[ishitasequeira]

What type of PR is this? /kind bug

What does this PR do / why we need it: Cherry-pick #1574

Have you updated the necessary documentation?

• [ ] Documentation update is required by this PR.
• [ ] Documentation has been updated.

Which issue(s) this PR fixes:

Fixes #? https://issues.redhat.com/browse/GITOPS-3465

How to test changes / Special notes to the reviewer: