ci(postgres): Fix pg_dump version mismatch by upgrading to v18

.github/actions/setup/action.yml

@@ -101,9 +101,15 @@ runs:
       # Install System Dependencies
       start_time=$(date +%s)
       curl -LsS https://r.mariadb.com/downloads/mariadb_repo_setup | sudo bash
+
+      sudo sh -c 'echo "deb http://apt.postgresql.org/pub/repos/apt $(lsb_release -cs)-pgdg main" > /etc/apt/sources.list.d/pgdg.list'
+      wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
+
       sudo apt -qq update
       sudo apt -qq remove mysql-server mysql-client
-      sudo apt -qq install libcups2-dev redis-server mariadb-client libmariadb-dev postgresql-client libpq-dev
+      sudo apt -qq remove -y postgresql-client postgresql-client-16 postgresql-client-common
+      sudo apt -qq install libcups2-dev redis-server mariadb-client libmariadb-dev postgresql-client-18 libpq-dev
+      echo "/usr/lib/postgresql/18/bin" >> $GITHUB_PATH
 
       wget -q -O /tmp/wkhtmltox.deb https://github.com/wkhtmltopdf/packaging/releases/download/0.12.6.1-2/wkhtmltox_0.12.6.1-2.jammy_amd64.deb
       sudo apt install /tmp/wkhtmltox.deb

.github/workflows/_base-server-tests.yml

@@ -66,7 +66,7 @@ jobs:
         index: ${{ fromJson(needs.gen-idx-integration.outputs.indices) }}
     services:
       postgres:
-        image: postgres:17.0
+        image: postgres:18.0
         ports:
           - 5432:5432
         env: