Simplify cheeps args passing into GCE metadata am: fda7014a85 am: 5b5954d0f9 am: 87ff3f1bbb am: c1cc0edb0b

Original change: https://android-review.googlesource.com/c/platform/tools/acloud/+/2051322

Change-Id: Iaa822ab5c2af444931e39b3ef5f23b6d8346318c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>