streamingccl: add show tenant without pts test

This patch adds a test for the fix in cockroachdb#120434

Epic: none

Release note: none

pkg/ccl/streamingccl/streamingest/stream_ingestion_job.go

@@ -279,6 +279,10 @@ func (s *streamIngestionResumer) handleResumeError(
 func (s *streamIngestionResumer) Resume(ctx context.Context, execCtx interface{}) error {
 	// Protect the destination tenant's keyspan from garbage collection.
 	jobExecCtx := execCtx.(sql.JobExecContext)
+
+	if err := jobExecCtx.ExecCfg().JobRegistry.CheckPausepoint("stream_ingestion.before_protection"); err != nil {
+		return err
+	}
 	err := s.protectDestinationTenant(ctx, jobExecCtx)
 	if err != nil {
 		return s.handleResumeError(ctx, jobExecCtx, err)

pkg/ccl/streamingccl/streamingest/testdata/show_without_pts

@@ -0,0 +1,19 @@
+# This test verifies that SHOW TENANT works even if a dest pts hasn't been set.
+
+create-replication-clusters
+----
+
+exec-sql as=destination-system
+SET CLUSTER SETTING jobs.debug.pausepoints = 'stream_ingestion.before_protection';
+----
+
+start-replication-stream
+----
+
+job as=destination-system wait-for-state=paused
+----
+
+query-sql as=destination-system
+SELECT replicated_time FROM [SHOW VIRTUAL CLUSTER destination WITH REPLICATION STATUS];
+----
+<nil>