storage: release storage/v1.7.0
storage: release storage/v1.7.0

Change-Id: I598b145158b3c51c4805f0f680e7a2a712eef117
Reviewed-on: https://code-review.googlesource.com/c/gocloud/+/55850
Reviewed-by: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>
Reviewed-by: Frank Natividad <52e924866916bede4f49dda05c657c45c4ff3b20@google.com>

googleapis/google-cloud-go,googleapis/google-cloud-go,googleapis/google-cloud-go,googleapis/google-cloud-go