drm_hwcomposer: CI: Upgrade to clang-13 && clang-tidy-13

+ address new clang-tidy findings.

Signed-off-by: Roman Stratiienko <roman.o.stratiienko@globallogic.com>
diff --git a/drm/DrmConnector.cpp b/drm/DrmConnector.cpp
index bd5277f..7cbec95 100644
--- a/drm/DrmConnector.cpp
+++ b/drm/DrmConnector.cpp
@@ -102,12 +102,12 @@
   uint64_t blob_id = 0;
   int ret = UpdateEdidProperty();
   if (ret != 0) {
-    return DrmModePropertyBlobUnique();
+    return {};
   }
 
   std::tie(ret, blob_id) = edid_property().value();
   if (ret != 0) {
-    return DrmModePropertyBlobUnique();
+    return {};
   }
 
   return MakeDrmModePropertyBlobUnique(drm_->fd(), blob_id);