After upgrading a system running PostgreSQL, it may happen that the versions of libc/icu installed on the system differ from the versions using to build various indexes using collations from those providers. This may in turn cause silent index corruption, as happened with MBS-13333.

It's an issue both externally (MBVM-90) and in production.

In order to mitigate this issue, we should provide a script that can be used to rebuild all indexes using collations after a system upgrade has been performed.