Feature Request: linux/aarch64 image builds

[starpit]

I see that the quay.io image builds only provide support for linux/amd64. It would be nice to have multi-arch images, at least including linux/aarch64.

fwiw, using docker buildx to build for linux/amd64 and linux/aarch64 is fairly trivial on a macOS apple silicon host.

[z103cb]

@anishasthana is this feature needed for RHODS integration?
cc: @sutaakar and @Srihari1192