[YSQL] Add separate GUCs for catalog version bump & negative caching #29941
Description
Jira Link: DB-19797
Description
We currently have one PG autoflag, yb_test_make_all_ddl_statements_incrementing, that controls both (1) whether to make all DDLs bump the catalog version, and (2) whether to enable negative caching.
For older versions that do not have the autoflag, we cannot safely enable this flag. We need to make sure all tservers are bumping the catalog version for all DDLs before we enable negative caching, and a single gflag upgrade is not atomic across the entire cluster.
Instead, we need two flags: one that makes all DDLs bump the catalog version, and a second one that enables negative caching. We can then safely enable these features in two steps: first, turn on the first flag, then when all tservers have restarted, we can enable the second flag.
Issue Type
kind/bug
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