Install gcloud auth plugin in kanister build image

[viveksinghggits]

Change Overview

When running the integration test using make integration-test we are asked to install minio using make install-minio but if our k8s cluster is gke and in the kuebconfig gcloud auth plugin is used, make install-minio fails with below error

Unable to connect to the server: getting credentials: exec: executable gke-gcloud-auth-plugin not found

It looks like you are trying to use a client-go credential plugin that is not installed.

To learn more about this feature, consult the documentation available at:
      https://kubernetes.io/docs/reference/access-authn-authz/authentication/#client-go-credential-plugins

Install gke-gcloud-auth-plugin for use with kubectl by following https://cloud.google.com/kubernetes-engine/docs/how-to/cluster-access-for-kubectl#install_plugin

And this seems to be happening because our build image doesn't have gcloud auth plugin installed. This PR installs that.

Pull request type

Please check the type of change your PR introduces:

• 🚧 Work in Progress
• 🌈 Refactoring (no functional changes, no api changes)
• 🐹 Trivial/Minor
• 🐛 Bugfix
• 🌻 Feature
• 🗺️ Documentation
• 🤖 Test
• 🏗️ Build

Issues

• fixes #issue-number

Test Plan

• 💪 Manual
• ⚡ Unit test
• 💚 E2E

[julio-lopez]

Any reason for not adding this in the first apt-get install above (line 7)?

Also, remove the apt-get clean above (line 14) and move it to after the last apt-get install below.

[viveksinghggits]

Hi @julio-lopez ,
Thank you for the review, I can work on above suggestions.
But I initially thought that we would just need to install gcloud and gcloud auth plugin, in the kanister build image, and things would work but that doesn't seem to be the case.

We will also have to set up gcloud authentication, which I think needs to be discussed with the team and then worked on, so I am planning to park this for now and work on it after discussing this in community call.