Reapply "Merge pull request #373 from Oloodi/368-sub-task-provision-and-copy-validation-database-instance"

This reverts commit eb149f680b.

backend/dataconnect/dataconnect.dev.yaml

@@ -0,0 +1,13 @@
+specVersion: "v1"
+serviceId: "krow-workforce-db"
+location: "us-central1"
+schema:
+  source: "./schema"
+  datasource:
+    postgresql:
+      database: "krow_db"
+      cloudSql:
+        instanceId: "krow-sql"
+        # schemaValidation: "STRICT"     # STRICT mode makes Postgres schema match Data Connect exactly.
+        # schemaValidation: "COMPATIBLE" # COMPATIBLE mode makes Postgres schema compatible with Data Connect.
+connectorDirs: ["./connector"]