Add postgresql18 versioned packaged to c10s

Related: RHELMISC-17290 RHELMISC-21208 RHELMISC-21207 RHELMISC-21206 RHELMISC-21205 RHELMISC-21204

Author: ljavorsk

configs/rhel-sst-cs-databases--db-postgresql18-extensions.yaml

@@ -0,0 +1,14 @@
+document: feedback-pipeline-workload
+version: 1
+data:
+  name: PostgreSQL 18 extensions
+  description: Server extensions for PostgreSQL 18
+  maintainer: rhel-sst-cs-databases
+  packages:
+    - postgresql18-pgaudit
+    - postgresql18-pg_repack
+    - postgresql18-pgvector
+    - postgresql18-decoderbufs
+    - postgresql18-postgis
+  labels:
+    - c10s

configs/rhel-sst-cs-databases--db-postgresql18.yaml

@@ -0,0 +1,20 @@
+document: feedback-pipeline-workload
+version: 1
+data:
+  name: PostgreSQL 18 client and server
+  description: Client tools and a server daemon for PostgreSQL 18
+  maintainer: rhel-sst-cs-databases
+  packages:
+    - postgresql18
+    - postgresql18-contrib
+    - postgresql18-plperl
+    - postgresql18-plpython3
+    #- postgresq18l-pltcl
+    - postgresql18-server
+    - postgresql18-server-devel
+    - postgresql18-static
+    - postgresql18-test
+    - postgresql18-upgrade
+    - postgresql18-upgrade-devel
+  labels:
+    - c10s