Reindex and capture timing for all the identified potentially corrupt indexes. Reindex after the ubuntu upgrade, during the downtime

We have identified potentially corrupt B-Tree, GiST, and GIN indexes

We would like to reindex these indexes during the downtime, immediately after we switch over from the main patroni cluster to the new ubuntu 20.04 cluster

Acceptance criteria:

1 - Provision a cluster in the benchmark environment using Ubuntu 20.04 & the disk snapshot from the production

2 - Reindex in parallel and capture timing for all the identified potentially corrupt indexes