Add script to detect flaky tests in testgrid.

Signed-off-by: Siyuan Zhang <sizhang@google.com>

tools/testgrid-analysis/main.go

@@ -0,0 +1,21 @@
+// Copyright 2024 The etcd Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package main
+
+import "go.etcd.io/etcd/tools/testgrid-analysis/v3/cmd"
+
+func main() {
+	cmd.Execute()
+}