partitionccl: add declarative version of backfill + zone config tests #136846
Description
We have some unit tests that run from AlterPrimaryKeyCorrectZoneConfigTest that are centered around how the legacy schema changer does things. One example of this is expecting the existence of a temporary index with the following suffix:
cockroach/pkg/sql/alter_primary_key.go
Line 491 in 9f61a38
ALTER PRIMARY KEY
Jira issue: CRDB-45270