remove strict encrypt variant of db2 (#31146)

Co-authored-by: erohmensing <erohmensing@users.noreply.github.com>

airbyte-integrations/connectors/source-db2/metadata.yaml

@@ -13,7 +13,7 @@ data:
   name: IBM Db2
   registries:
     cloud:
-      enabled: false # Requires a strict-encrypt variant
+      enabled: false # Would require DEPLOYMENT_MODE=cloud handling to release to cloud again
     oss:
       enabled: true
   releaseStage: alpha