Adjusted hub package for upcoming 3.27 release to migrate the database of previous versions

master/3.27.0 will have a new major version of PostgreSQL: 18.0.
Versions 3.26 and older use a previous major version and so require a database migration.

This change should NOT be back-ported as 3.24.x is stuck at PostgreSQL 17.x and 3.21.x at 15.x.

Ticket: ENT-13266
Changelog: title

Author: craigcomstock

packaging/common/cfengine-hub/preinstall.sh

@@ -15,8 +15,8 @@ if is_upgrade; then
     fi
 fi
 
-# When PostgreSQL changes major version we need to migrate. CFEngine 3.25 uses PostgreSQL 17.0 so any version 3.24 or older needs migration.
-if is_upgrade && egrep '^3\.([6-9]|1[0-9]|2[0-4])\.' "$PREFIX/UPGRADED_FROM.txt" >/dev/null && [ -d "$PREFIX/state/pg/data" ]; then
+# When PostgreSQL changes major version we need to migrate. CFEngine 3.27 uses PostgreSQL 18.0 so any version 3.26 or older needs migration.
+if is_upgrade && egrep '^3\.([6-9]|1[0-9]|2[0-6])\.' "$PREFIX/UPGRADED_FROM.txt" >/dev/null && [ -d "$PREFIX/state/pg/data" ]; then
   alias migrating_postgres='true'
 else
   alias migrating_postgres='false'