[infra] Upgrade gsutil to 5.5

Change-Id: Ida732167c7cbf7a8daec16220b7c3c4bc951dfa4
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/223804
Reviewed-by: William Hesse <whesse@google.com>
Commit-Queue: Alexander Thomas <athom@google.com>
diff --git a/DEPS b/DEPS
index ecc3577..66d0909 100644
--- a/DEPS
+++ b/DEPS
@@ -278,7 +278,7 @@
   Var("dart_root") + "/third_party/gsutil": {
       "packages": [{
           "package": "infra/3pp/tools/gsutil",
-          "version": "version:4.58",
+          "version": "version:2@5.5",
       }],
       "dep_type": "cipd",
   },