Stop acceptance test deleting in-use service account (#10010) (#6985)

[upstream:ef763566fb57f8eb571e4ccf3983b62649211d32]

Signed-off-by: Modular Magician <[email protected]>

Author: modular-magician

.changelog/10010.txt

@@ -0,0 +1,3 @@
+```release-note:none
+
+```

google-beta/services/workstations/resource_workstations_workstation_config_test.go

@@ -673,6 +673,15 @@ resource "google_workstations_workstation_cluster" "default" {
   location                   = "us-central1"
 }
 
+# No longer explicitly used in google_workstations_workstation_config resource block below, but the
+# service account needs to keep existing to allow the field to default from the API without error
+resource "google_service_account" "default" {
+  provider = google-beta
+
+  account_id   = "tf-test-my-account%{random_suffix}"
+  display_name = "Service Account"
+}
+
 resource "google_workstations_workstation_config" "default" {
   provider               = google-beta
   workstation_config_id  = "tf-test-workstation-config%{random_suffix}"
@@ -727,6 +736,15 @@ resource "google_workstations_workstation_cluster" "default" {
   location                   = "us-central1"
 }
 
+# No longer explicitly used in google_workstations_workstation_config resource block below, but the
+# service account needs to keep existing to allow the field to default from the API without error
+resource "google_service_account" "default" {
+  provider = google-beta
+
+  account_id   = "tf-test-my-account%{random_suffix}"
+  display_name = "Service Account"
+}
+
 resource "google_workstations_workstation_config" "default" {
   provider               = google-beta
   workstation_config_id  = "tf-test-workstation-config%{random_suffix}"