resource/cloudflare_argo: call Read operation on Import

Ensures we sync the remote with the local on `Import` operations.

Closes #1135

.changelog/1295.txt

@@ -0,0 +1,3 @@
+```release-note:bug
+resource/cloudflare_argo: call `Read` for `Import` operations
+```

cloudflare/resource_cloudflare_argo.go

@@ -53,24 +53,20 @@ func resourceCloudflareArgoRead(d *schema.ResourceData, meta interface{}) error
 	d.SetId(checksum)
 	d.Set("zone_id", zoneID)
 
-	if _, ok := d.GetOk("tiered_caching"); ok {
-		tieredCaching, err := client.ArgoTieredCaching(context.Background(), zoneID)
-		if err != nil {
-			return errors.Wrap(err, "failed to get tiered caching setting")
-		}
-
-		d.Set("tiered_caching", tieredCaching.Value)
+	tieredCaching, err := client.ArgoTieredCaching(context.Background(), zoneID)
+	if err != nil {
+		return errors.Wrap(err, "failed to get tiered caching setting")
 	}
 
-	if _, ok := d.GetOk("smart_routing"); ok {
-		smartRouting, err := client.ArgoSmartRouting(context.Background(), zoneID)
-		if err != nil {
-			return errors.Wrap(err, "failed to get smart routing setting")
-		}
+	d.Set("tiered_caching", tieredCaching.Value)
 
-		d.Set("smart_routing", smartRouting.Value)
+	smartRouting, err := client.ArgoSmartRouting(context.Background(), zoneID)
+	if err != nil {
+		return errors.Wrap(err, "failed to get smart routing setting")
 	}
 
+	d.Set("smart_routing", smartRouting.Value)
+
 	return nil
 }
 
@@ -125,5 +121,7 @@ func resourceCloudflareArgoImport(d *schema.ResourceData, meta interface{}) ([]*
 	d.SetId(id)
 	d.Set("zone_id", zoneID)
 
+	resourceCloudflareArgoRead(d, meta)
+
 	return []*schema.ResourceData{d}, nil
 }