Remove dependencies on test and build containers

[sarcasticadmin]

Description

Spun out from: https://github.com/socallinuxexpo/scale-network/issues/418#issuecomment-1523635591

However, to echo @kylerisse other comments earlier in the thread, I really dont think we need the containers we have.

ansible-tester - Most of this can be done via nix. We were largely using the container for consistency for the packages.
scale-signs - Again were largely using the container for consistency for the packages, even if we have to use it "as-is" we can get the correct packages on the vm directly via nix now.
scale-openwrt - Ditto for this as well

Acceptance Criteria

• Remove the dependencies on the build and tests containers in this repo (except scale-openwrt since theres no easy alternative)

[owendelong]

What else is needed to finish this?

[sarcasticadmin]

We can close this given that the majority of the work has been done and stable. The latest remaining container in the build process will be dealt with as part of #617