Bump Postgres version in drivers tests in CI to 12 (#34403)

* Bump Postgres in drivers tests to 12

* Update env vars

* Authenticate with password

* user name with prefix pg_ is not allowed

---------

Co-authored-by: Ngoc Khuat <qn.khuat@gmail.com>

.github/workflows/drivers.yml

@@ -463,20 +463,21 @@ jobs:
       MB_DB_TYPE: postgres
       MB_DB_PORT: 5432
       MB_DB_HOST: localhost
-      MB_DB_DBNAME: circle_test
-      MB_DB_USER: circle_test
-      MB_POSTGRESQL_TEST_USER: circle_test
+      MB_DB_DBNAME: mb_test
+      MB_DB_USER: mb_test
+      MB_POSTGRESQL_TEST_USER: mb_test
     services:
       postgres:
-        image: circleci/postgres:9.6-alpine
+        image: postgres:12-alpine
         ports:
           - "5432:5432"
         env:
-          POSTGRES_USER: circle_test
-          POSTGRES_DB: circle_test
+          POSTGRES_USER: mb_test
+          POSTGRES_DB: mb_test
+          POSTGRES_HOST_AUTH_METHOD: trust
     steps:
     - uses: actions/checkout@v3
-    - name: Test Postgres driver (9.6)
+    - name: Test Postgres driver (12)
       uses: ./.github/actions/test-driver
       with:
         junit-name: 'be-tests-postgres-ee'