Update interp recipe workflow to match the others (#1701)

### Description

Do the same Dockerfile change to the interpretability workflow in CI
that was recently done to other workflows. Split out of
#1699

### Type of changes

<!-- Mark the relevant option with an [x] -->

- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Refactor
- [ ] Documentation update
- [x] Other (please describe): CI update

### CI Pipeline Configuration

Configure CI behavior by applying the relevant labels. By default, only
basic unit tests are run.

-
[ciflow:skip](https://github.com/NVIDIA/bionemo-framework/blob/main/docs/docs/main/contributing/contributing.md#ciflow:skip)
- Skip all CI tests for this PR
-
[ciflow:notebooks](https://github.com/NVIDIA/bionemo-framework/blob/main/docs/docs/main/contributing/contributing.md#ciflow:notebooks)
- Run Jupyter notebooks execution tests
-
[ciflow:slow](https://github.com/NVIDIA/bionemo-framework/blob/main/docs/docs/main/contributing/contributing.md#ciflow:slow)
- Run slow single GPU integration tests marked as @pytest.mark.slow
-
[ciflow:all](https://github.com/NVIDIA/bionemo-framework/blob/main/docs/docs/main/contributing/contributing.md#ciflow:all)
- Run all tests, including unit tests, slow tests, notebooks, and every
recipe/model directory.

Unit tests marked as `@pytest.mark.multi_gpu` or
`@pytest.mark.distributed` are not run in the PR pipeline.

For more details, see [CONTRIBUTING](CONTRIBUTING.md)

> [!NOTE]
> By default, only basic unit tests are run. Add appropriate labels to
enable an additional test coverage.

#### Authorizing CI Runs

We use
[copy-pr-bot](https://docs.gha-runners.nvidia.com/apps/copy-pr-bot/#automation)
to manage authorization of CI
runs on NVIDIA's compute resources.

- If a pull request is opened by a trusted user and contains only
trusted changes, the pull request's code will
automatically be copied to a pull-request/ prefixed branch in the source
repository (e.g. pull-request/123)
- If a pull request is opened by an untrusted user or contains untrusted
changes, an NVIDIA org member must leave an
`/ok to test` comment on the pull request to trigger CI. This will need
to be done for each new commit.

#### Triggering Code Rabbit AI Review

To trigger a code review from code rabbit, comment on a pull request
with one of these commands:

- @coderabbitai review - Triggers a standard review
- @coderabbitai full review - Triggers a comprehensive review

See https://docs.coderabbit.ai/reference/review-commands for a full list
of commands.

### Pre-submit Checklist

<!--- Ensure all items are completed before submitting -->

- [ ] I have tested these changes locally
- [ ] I have updated the documentation accordingly
- [ ] I have added/updated tests as needed
- [ ] All existing tests pass successfully


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Chores**
* Updated the continuous integration environment for interpretability
recipe checks.
  * Improved dependency setup and caching for automated test runs.
* Refreshed the underlying test environment to support more consistent
and reliable validation.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Signed-off-by: John St John <jstjohn@nvidia.com>

Author: jstjohn

.github/workflows/unit-tests-interpretability-recipes.yaml

@@ -84,8 +84,8 @@ jobs:
           fi
           echo "Recipes to run: $DIRS"
 
-          # Attach the runner image (the dockerhub-cached squashed pytorch, like the repo-wide lane).
-          IMG="svcbionemo023/bionemo-framework:pytorch26.04-py3-squashed"
+          # Attach the same default runner image as the repo-wide recipe lane.
+          IMG="nvcr.io/nvidia/pytorch:26.06-py3"
           MATRIX=$(echo "$DIRS" | jq -c --arg img "$IMG" \
             'map({dir: ., name: (. | split("/") | last), image: $img})')
           echo "dirs=$MATRIX" >> "$GITHUB_OUTPUT"
@@ -138,6 +138,11 @@ jobs:
             ${{ runner.os }}-huggingface-interp-${{ matrix.recipe.name }}-
             ${{ runner.os }}-huggingface-
 
+      - name: Setup uv
+        uses: astral-sh/setup-uv@d0d8abe699bfb85fec6de9f7adb5ae17292296ff
+        with:
+          enable-cache: true
+
       - name: Install dependencies
         working-directory: ${{ matrix.recipe.dir }}
         run: bash .ci_build.sh