Version 2.17.0-266.5.beta

* Cherry-pick 2badd2e71eaeb5c6b24005af5005fe1220ce21a9 to beta
* Cherry-pick 54af2c5fd1c54025196bd3a63b09c13ead817ed9 to beta
* Cherry-pick 29f9b208185ab6b7067c7d8816831d74cebbc36b to beta
* Cherry-pick 3d8290d926b7b909bc8ff19b4d6d96c2301d81c3 to beta
diff --git a/tools/VERSION b/tools/VERSION
index 349b693..caf2558 100644
--- a/tools/VERSION
+++ b/tools/VERSION
@@ -28,4 +28,4 @@
 MINOR 17
 PATCH 0
 PRERELEASE 266
-PRERELEASE_PATCH 1
\ No newline at end of file
+PRERELEASE_PATCH 5
\ No newline at end of file