Fix ubi8-rust-builder to a specific sha or tag

Currently, the ubi8-rust-builder-image get's build once a day, every time we build the rust builder image our operator images can't be reproduced to the exactly same image as before.

As a consequence, we can't reproduce previous operator releases as they were.

Suggestion:
Fix ubi8-rust-builder to a specific Tag for at least releases. Thus we need in the build process an option to specify imags.

首先定位 ubi8-rust-builder-image 引用，以及选择 builder image 的构建流程。确定 release 如何固定 tag 或 SHA 并提供镜像选择选项；当构建可以使用相同的 builder image 来复现之前的 operator release 时，即视为完成。