Version 1.19.0-dev.2.1

Cherry-pick cd92d6a831b511adaabb8c40cfcb8e30bed8461e to dev
Cherry-pick 27e59484ea66bdeccd307e070bf49c1c7400d1a9 to dev
Cherry-pick cdb317d88b18c850577af9d51c073d845e7680b6 to dev
diff --git a/tools/VERSION b/tools/VERSION
index 59e58d0..f76290b 100644
--- a/tools/VERSION
+++ b/tools/VERSION
@@ -28,4 +28,4 @@
 MINOR 19
 PATCH 0
 PRERELEASE 2
-PRERELEASE_PATCH 0
+PRERELEASE_PATCH 1