Fix: enable stable Drupal OIDC support and PHP 8.2 base image

- Switched Drupal base image to PHP 8.2 for compatibility with openid_connect 2.x
- Added mariadb-client to container to allow Drush to drop tables
- Upgraded OIDC module from ^1 to ^2@beta for entity-based client configuration
- Replaced legacy client creation task with generic plugin-based entity creation
- Ensured /usr/local/bin is in PATH for www-data user
- Updated oidc.yml to explicitly use the generic plugin

References: https://chatgpt.com/share/6905cecc-8e3c-800f-849b-4041b6925381

roles/web-app-drupal/config/main.yml

@@ -7,6 +7,7 @@ features:
   oidc:               true
   central_database:   true
   logout:             true
+
 server:
   csp:
     flags: {}
@@ -15,18 +16,21 @@ server:
     canonical:
       - "drupal.{{ PRIMARY_DOMAIN }}"
     aliases: []
+
 docker:
   services:
     database:
       enabled:            true
     drupal:
-      version:            latest
+      # Use a PHP 8.2+ base image to ensure compatibility with OIDC 2.x syntax
+      version:            "10-php8.2-apache"
       image:              drupal
       name:               drupal
       backup:
         no_stop_required: true
   volumes:
     data:                 drupal_data
+
 rbac:
   roles:
     authenticated: