Improve error messages for workspaces setup script
The following discussion from !169739 should be addressed: - [ ] @vtak started a [discussion](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/169739#note_2166236129): (+8 comments) > **Author notes** > > This logic ensures that (almost) any subsequent upgrades after the first-time installation are very straight-forward where it gets the values from the existing chart if they are not set and are required. > > Since the latest release had some change in the structure of the secret, you'll have to run this script as > > ```shell > CLIENT_ID="UPDATE_ME" CLIENT_SECRET="UPDATE_ME" ./scripts/remote_development/workspaces_kubernetes_setup.sh > ``` > > After this, you should be able to run it directly without any environment variables and the script will try to gather the required information. > > ```shell > ./scripts/remote_development/workspaces_kubernetes_setup.sh > ```
issue