Developer Sandbox Login experience enhancement

[mohitsuman]

Improve the developer sandbox login experience using Builder service account.

[datho7561]

Here's what I've figured out so far:

1. OpenShift Sandbox has a builder service account, but by default the account doesn't have enough permissions to do anything useful on the cluster. There is a role called edit that the user account. If we use a role binding to assign the builder account this role, then it can be used for vscode-openshift
2. The service account pipeline already has the edit role, so we can try using that account instead of builder