There are a few tests that currently use the statically generated
backcompat indexes. This change moves them to a shared location, so they
no longer have to build a path based on the package name of the old
index tests.
When index is introduced into the cluster via cluster upgrade, restore or as a dangled index the MetaDataIndexUpgradeService checks if this index can be upgraded to the current version. If upgrade is not possible, the newly upgraded cluster startup and restore process are aborted, the dangled index is imported as a closed index that cannot be open.
Closes#10215