[COST-5214] Remove directive to make the build work with docker

[samdoran]

Jira Ticket

COST-5214

Description

There is a podman bug that needs to be resolved which required adding this out of stage directive. Unfortunately that broke the image build for docker, which we use heavily.

This is a terrible hack until the bug in podman is resolved.

containers/podman#23046

Testing

1. Checkout Branch
2. make docker-build

Release Notes

• proposed release note

* [COST-5214](https://issues.redhat.com/browse/COST-5214) Fix the container image for local development

[samdoran]

What's very confusing about this is that adding the global ARG TARGETARCH declaration fixed the build for podman, but it breaks it for docker.

As best I can tell, docker sets TARGETARCH automatically. By adding ARG TARGETARCH it sets the value to nothing, which is what breaks the docker build.

Changing the directive to ARG TARGETARCH=arm64 allows it work for both docker and podman, but hard cording the architecture defeats the purpose of using the variable in the first place.