Merge ResourceConfig's `serviceAccount` and `serviceAccounts` configuration options

[rohanKanojia]

Component

JKube Kit

Task description

Description

We seem to have two fields in ResourceConfig for configuring ServiceAccounts:

• serviceAccount - accepts ServiceAccount name only
• serviceAccounts - list with each element accepting ServiceAccount name and Deployment to bind it to

This can be a bit confusing for users and it doesn't provide fine-grained control over things like:

• binding ServiceAccount to all controllers
• binding ServiceAccount to specific controller only
• whether to generate new ServiceAccount or not

We might want to deal with the ResourceConfig pojo and maybe remove the getServiceAccount getter, or evaluate how both configurations should be merged.

Originally posted by @manusa in https://github.com/eclipse/jkube/issues/1758#issuecomment-1302138214