User install flow includes STS configuration

As a user of the console, I would like to provide the required fields for tokenized auth at install time (wrapping and providing sane defaults for what I can do manually in the CLI).

The role ARN provided by the user should be added to the service account of the installed operator as an annotation.

Only manual subscription is supported in STS mode - the automatic option should be not be the default or should be grey'd out entirely

AC: Add input field to the operator install page, where user can provide the `roleARN` value. This value will be set on the operator's Subscription resource, when installing operator.