[Release] Update merge script to leverage auto-tag bot

tools/release/git_recipes.py

Index: tools/release/git_recipes.py
diff --git a/tools/release/git_recipes.py b/tools/release/git_recipes.py
index 89fd7c9cf663828220d35e6d720eaee2547f89c7..b4c9de6d6cb338f8654e04ce086ae281c616bc75 100644
--- a/tools/release/git_recipes.py
+++ b/tools/release/git_recipes.py
@@ -242,6 +242,10 @@ class GitRecipesMixin(object):
     self.Git(
         "cl land -f --bypass-hooks", retry_on=lambda x: x is None, **kwargs)
 
+  def GitCLAddComment(self, message, **kwargs):
+    args = ["cl", "comments", "-a", Quoted(message)]
+    self.Git(MakeArgs(args), **kwargs)
+
   def GitDiff(self, loc1, loc2, **kwargs):
     return self.Git(MakeArgs(["diff", loc1, loc2]), **kwargs)