Summary:
This diff makes some changes to improve logging incremental catalog cache
refresh to debugging a few cases found in QA stress test when full catalog
refreshes were performed unexpectedly.
Jira: DB-16921

Test Plan:
(1) ./yb_build.sh release --cxx-test pg_catalog_version-test

(2) start a RF-3 local cluster on my own dev vm, look at tserver logs to ensure
that there are no log flooding caused by this change when there is no DDL
statement executed.

Reviewers: kfranz, sanketh, mihnea

Reviewed By: kfranz

Subscribers: yql

Differential Revision: https://phorge.dev.yugabyte.com/D44459