Please address the comments from this code review:

## Overall Comments
- Double-check that all CI matrix definitions and scripts no longer reference the removed `matrix.arch` and `TARGET_ARCH` variables to avoid leftover configuration errors.
- Validate that switching the operator Dockerfile base image from ubi9 to ubi8 and removing the `TARGET_ARCH` argument is intentional and compatible with our current build environment.
- Ensure the removal of `push_operator_image` and `push_operator_manifest_lists` in scripts/ci/lib.sh does not leave any dangling invocations elsewhere in the repo.

## Individual Comments

### Comment 1
<location> `operator/Dockerfile:18` </location>
<code_context>

 # Cache deps before building and copying source so that we don't need to re-download as much and so that source changes
 # don't invalidate our downloaded layer.
-# We're not using `go mod tidy` here because go mod tidy needs to examine _source code_ in order to find unused modules.
+# We're not using `go mod tidy` here becuase go mod tidy needs to examine _source code_ in order to find unused modules.
 # There's no source code in this docker layer yet and so `go mod tidy` would empty go.mod and go.sum which is not what
 # we want. If we're to COPY source before running `go mod tidy`, local docker build times would go up because any code
</code_context>

<issue_to_address>
**nitpick (typo):** Typo: 'becuase' should be 'because'.

```suggestion
# We're not using `go mod tidy` here because go mod tidy needs to examine _source code_ in order to find unused modules.
```
</issue_to_address>