feat(TOOLS-6035): Update images in Dockerfiles

[oBarz]

This PR updates the path into the Docker files for CI images to pull them from our private proxy registry.

Issue

TOOLS-6035

Documentation Review Checklist

• The technical/feature documentation related to the changes is created/updated

Please refer to our Documentation overview for more information.

PR guidelines

This PR aims to comply with the Contribution Guidelines and our best practices.

[bobh66]

This looks like a private PR that escaped and made it's way upstream? I thought the proxy issue could be handled by environment variables, though I haven't tried it in a while.

[haarchri]

@bobh66 if you use a single provider instance to manage many clusters in various networks, in some environments you need to talk with different proxies - if its only one Proxy true use a DeploymentRuntimeConfig and set PROXY / NOPROXY environment variables should be enough