refactor: simplify gcloud install, drop redundant apt deps

curl and python3 are already in the base image. Use
dpkg --print-architecture instead of uname+sed for the
download URL.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: e2e-fix-agent

images/code/Containerfile

@@ -47,32 +47,17 @@ RUN mkdir -p "$COREPACK_HOME" \
 
 # ---------------------------------------------------------------------------
 # gcloud CLI — downloads E2E test artifacts from GCS buckets.
-# Prow stores nightly/PR test results in gs://test-platform-results.
-# The e2e-failure-analysis skill's download-artifacts.py calls
-# `gcloud storage rsync` and `gcloud storage cp` to fetch them.
-#
-# Install only the base SDK (no extra components) to keep the image lean.
-# Authentication is handled at runtime via service-account keys or
-# workload identity — no credentials are baked into the image.
-#
-# Pin to a specific version for reproducible builds.
+# Prow stores results in gs://test-platform-results; the e2e-failure-analysis
+# skill uses `gcloud storage rsync/cp` to fetch them.
+# Auth is runtime-only (service-account key or workload identity).
 ARG GCLOUD_VERSION=526.0.0
-RUN apt-get update \
-    && apt-get install -y --no-install-recommends \
-        curl \
-        python3 \
-    && curl -sSL "https://dl.google.com/dl/cloudsdk/channels/rapid/downloads/google-cloud-cli-${GCLOUD_VERSION}-linux-$(uname -m | sed 's/aarch64/arm/;s/x86_64/x86_64/').tar.gz" \
+RUN curl -sSL "https://dl.google.com/dl/cloudsdk/channels/rapid/downloads/google-cloud-cli-${GCLOUD_VERSION}-linux-$(dpkg --print-architecture).tar.gz" \
         | tar -xz -C /opt \
-    && /opt/google-cloud-sdk/install.sh \
-        --quiet \
-        --usage-reporting false \
-        --command-completion false \
-        --path-update false \
+    && /opt/google-cloud-sdk/install.sh --quiet --usage-reporting false \
+        --command-completion false --path-update false \
     && ln -s /opt/google-cloud-sdk/bin/gcloud /usr/local/bin/gcloud \
     && ln -s /opt/google-cloud-sdk/bin/gsutil /usr/local/bin/gsutil \
-    && gcloud --version \
-    && apt-get clean \
-    && rm -rf /var/lib/apt/lists/*
+    && gcloud --version
 
 # ---------------------------------------------------------------------------
 # pwtrace — Playwright trace analysis CLI for E2E failure debugging.