bump postgres versions in CI and dev (#7655)

Upgrade postgres versions to:
 - 14.12
 -  15.7
 - 16.3

Depends on https://github.com/citusdata/the-process/pull/158

(cherry picked from commit accb7d09f7)

.github/workflows/build_and_test.yml

@@ -26,12 +26,12 @@ jobs:
       pgupgrade_image_name: "ghcr.io/citusdata/pgupgradetester"
       style_checker_image_name: "ghcr.io/citusdata/stylechecker"
       style_checker_tools_version: "0.8.18"
-      sql_snapshot_pg_version: "16.2"
-      image_suffix: "-v7693016"
-      pg14_version: '{ "major": "14", "full": "14.11" }'
-      pg15_version: '{ "major": "15", "full": "15.6" }'
-      pg16_version: '{ "major": "16", "full": "16.2" }'
-      upgrade_pg_versions: "14.11-15.6-16.2"
+      sql_snapshot_pg_version: "16.3"
+      image_suffix: "-v13fd57c"
+      pg14_version: '{ "major": "14", "full": "14.12" }'
+      pg15_version: '{ "major": "15", "full": "15.7" }'
+      pg16_version: '{ "major": "16", "full": "16.3" }'
+      upgrade_pg_versions: "14.12-15.7-16.3"
     steps:
       # Since GHA jobs needs at least one step we use a noop step here.
       - name: Set up parameters