Fix metadata drifting on workbench instances (#11407) (#19119)

[upstream:8ccabb776d29cf0edd5286dd9bb8a077a7740d9c]

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

Author: modular-magician

.changelog/11407.txt

@@ -0,0 +1,3 @@
+```release-note:bug
+workbench: fixed a bug with workbench instance metadata drifting when using custom containers.
+```

google/services/workbench/resource_workbench_instance.go

@@ -63,6 +63,7 @@ var WorkbenchInstanceProvidedMetadata = []string{
 	"agent-health-check-interval-seconds",
 	"agent-health-check-path",
 	"container",
+	"cos-update-strategy",
 	"custom-container-image",
 	"custom-container-payload",
 	"data-disk-uri",
@@ -81,6 +82,7 @@ var WorkbenchInstanceProvidedMetadata = []string{
 	"generate-diagnostics-bucket",
 	"generate-diagnostics-file",
 	"generate-diagnostics-options",
+	"google-logging-enabled",
 	"image-url",
 	"install-monitoring-agent",
 	"install-nvidia-driver",
@@ -103,6 +105,7 @@ var WorkbenchInstanceProvidedMetadata = []string{
 	"report-system-status",
 	"restriction",
 	"serial-port-logging-enable",
+	"service-account-mode",
 	"shutdown-script",
 	"title",
 	"use-collaborative",