google-cloud-cli has a huge install size

It's something like 1 gigabyte of install size when I follow the instructions on https://cloud.google.com/storage/docs/gsutil_install
(and then I'm not even counting the dependencies, I'm only looking at `/usr/lib/google-cloud-sdk`)

This seems very excessive for what is supposed to be just a command line interface to a cloud platform.

Please consider being a bit more size-aware when packaging these things. For example, I see a huge unstripped binary in `/usr/lib/google-cloud-sdk/bin/anthoscli` (174 MB) and a big uncompressed JSON file in `/usr/lib/google-cloud-sdk/data/cli/gcloud.json` (83 MB). Also it looks like a bunch of test code is being shipped as part of the package:

```
$ ls -R /usr/lib/google-cloud-sdk |grep test |wc -l
1609
```
which makes me think this is not actually a packaged tool but more like a dump of a development repository.

It feels like there is a lot of low hanging fruit to reduce the install size of this tool.

Start by reproducing the install from the linked gsutil instructions and measuring /usr/lib/google-cloud-sdk. Inspect bin/anthoscli, data/cli/gcloud.json, and the shipped test files identified in the report. Done means agreeing on packaging changes that materially reduce the installed size without removing required CLI functionality.

Written by the indexing model from the issue text.