Fixes env variables key for vector pods
What does this MR do and why?
This changes the clickhouse env variable name for vector pods as they were getting replaced with another value in prepare-custom-values go task
How to set up and validate
- Before taking a pull from this branch, try setting up cluster using instructions given in installation.md
- Vector pods remain in CrashLoopBackOff. Note that environment variables for clickhouse is not properly set in vector pod.
- Take a pull from this branch. Setup a new cluster as per instructions given in installation.md or update existing release using steps given in upgrade.md
- Vector pods should be up and running.
Fixes https://gitlab.com/gitlab-org/analytics-section/product-analytics/analytics-stack/-/issues/162