[dkr] Add azcopy and gsutil to tools image
[dkr] Add azcopy and gsutil to tools image

Add `azcopy` and `gsutil` to support backup in Azure and GCP. Install
`gsutil` using the standalone method instead of installing the entire
Cloud SDK: https://cloud.google.com/storage/docs/gsutil_install#alt-install

Closes: #6053

libra/libra,aptos-labs/aptos-core,aptos-labs/aptos-core,aptos-labs/aptos-core,libra/libra,aptos-labs/aptos-core,libra/libra,aptos-labs/aptos-core,aptos-labs/aptos-core,libra/libra,libra/libra,aptos-labs/aptos-core