move bin/ to tools/

The directories are not that different now. Also, clean up .bazelrc

tools/mod-tidy

@@ -0,0 +1,12 @@
+#!/bin/sh
+
+# Copyright 2023 Uber Technologies, Inc.
+# Licensed under the Apache License, Version 2.0
+set -xeu
+
+cd "$(git rev-parse --show-toplevel)"
+echo "--- go mod tidy"
+tools/bazel run @go_sdk//:bin/go -- mod tidy
+
+echo "--- gazelle-update-repos"
+exec tools/bazel run //:gazelle-update-repos