BigQuery reservation (#3441)

* First Commit.

* Improve

* Fix README

* Fix lint

* fix

* Fix Tests.

* Improve output

* fix yaml lint

* Fix

* Fic test

* Fix

* Fix output

modules/project/bigquery-reservation.tf

@@ -0,0 +1,66 @@
+/**
+ * Copyright 2025 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+locals {
+  _assignments = flatten([
+    for reservation_name, reservation in var.bigquery_reservations : [
+      for job_type, assignees in reservation.assignments : [
+        for assignee in assignees : {
+          key              = "${reservation_name}-${job_type}-${assignee}"
+          reservation_name = reservation_name
+          location         = reservation.location
+          job_type         = job_type
+          assignee         = assignee
+        }
+      ]
+    ]
+  ])
+  assignments = { for a in local._assignments : a.key => a }
+}
+
+resource "google_bigquery_reservation" "default" {
+  for_each = var.bigquery_reservations
+
+  project            = local.project.project_id
+  location           = each.value.location
+  name               = each.key
+  slot_capacity      = each.value.slot_capacity
+  ignore_idle_slots  = each.value.ignore_idle_slots
+  concurrency        = each.value.concurrency
+  edition            = each.value.edition
+  secondary_location = each.value.secondary_location
+
+  dynamic "autoscale" {
+    for_each = each.value.max_slots == null ? [] : [each.value.max_slots]
+    content {
+      max_slots = autoscale.value
+    }
+  }
+
+  depends_on = [
+    google_project_service.project_services
+  ]
+}
+
+resource "google_bigquery_reservation_assignment" "default" {
+  for_each = local.assignments
+
+  project     = local.project.project_id
+  location    = each.value.location
+  reservation = google_bigquery_reservation.default[each.value.reservation_name].id
+  assignee    = each.value.assignee
+  job_type    = each.value.job_type
+}