"Enhance Placement Process" has the following spec changes in Antelope.
* In AZ reselection, randomly select from unselected AZs without
considering Affinity/Anti-Affinity
* Only StandardUserData is the target of reselection processing
(Delete the description of AutoScalingGroup)
* Delete the configuration value for whether to reselect AZ
This patch fixes these changes and moves spec of
"Enhance Placement Process" to the directory for 2023.1.
Implements: blueprint enhance-placement
Change-Id: I3629f17e8df17a2947100215e4ad7556fa812124
7cdebc9719