Resource scheduler: never schedule TRANSIENT blocked resources

[sanderr]

#8423 implemented conservative scheduling of resources marked as BlockedStatus.TRANSIENT. Meaning even if we think it will have no effect, we will execute repairs (and only repairs) for resources that have previously skipped for dependencies. The conservative scheduling has been accompanied by a warning message to raise awareness of any faulty assumptions.

Once we have confidence that our tracking of BlockedStatus.TRANSIENT resources is correct, we can drop this conservative scheduling. We can then be confident that any such resource never needs to be scheduled.

• check for comments marked with #8580
• check if any other changes need to be made